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Old 05/09/16, 06:18 PM   #16
FRANKO289
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71 on 39.5s

PALM BEACH FL
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looks sweet ... what month and year is your 71 ? U15GL??xxxx?
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Old 05/10/16, 09:39 AM   #17
OPCJeff
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The Coal Burner Bronco

Orange, CA
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Quote:
Originally Posted by franko289 View Post
looks sweet ... What month and year is your 71 ? U15gl??xxxx?
glk34082
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Old 05/10/16, 10:37 AM   #18
FRANKO289
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71 on 39.5s

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glk34082
sweet .. one of the last once made in Oct 1970
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Old 05/18/16, 11:55 AM   #19
OPCJeff
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The Coal Burner Bronco

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does my code tell you about the original paint color? I think it was orange but there were many different colors on different panels.
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Old 05/18/16, 12:06 PM   #20
OPCJeff
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The Coal Burner Bronco

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4BT Cummins Motor Mounts

So Here's what I did for the motor mounts

I got a bunch of "scrap" metal from the steel yard by my house.


I used large heavy wall square tube to make the frame side brackets




I welded those inline with the springs in the same position front to back as the old mounts. But the cool thing is that the cummins mount in the front not in the center so my weight distribution got way better.


And here's what I came up with for the engine side of the mounts.
I used this old break I picked up at a swap meet a long time ago to make the bends




I had to drill all the mounting holes which I amazingly got right the first time


and between the bends and the holes everything lined up and worked great. Here is one side mocked up on the motor

Last edited by OPCJeff; 08/11/17 at 10:03 AM..
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Old 05/18/16, 12:10 PM   #21
COSCAG00
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Bryan,Tx
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Great looking Bronco!
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Old 05/18/16, 12:13 PM   #22
OPCJeff
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The Coal Burner Bronco

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Great looking Bronco!
Thanks!!
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Old 05/18/16, 01:05 PM   #23
BigBlueBronco71
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Awesome fab work on the mounts! Stick welding them I assume, 7018?
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Old 05/18/16, 03:53 PM   #24
OPCJeff
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The Coal Burner Bronco

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Awesome fab work on the mounts! Stick welding them I assume, 7018?
Unfortunately thats how good my wire feed welds look. If i could make stick welds look that good I would consider myself a good welder

I have a pretty big wire feed and I run it on hot so they are strong welds
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Old 05/23/16, 01:36 PM   #25
OPCJeff
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The Coal Burner Bronco

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So with the engine mounts done I went to the trans mounts. Since the engine mounts were vertical I thought it might be a good idea to have the trans mounts at an angle to help encourage the engine to stay centered. Also the transfer case adapter was already set up for and angle so it just made sense. I started by using a piece of thin wall square tube to get my angles. I just cut slices almost all the way through and then bent the tube up . I kept cutting one slice at a time until I got my angles right.




Once they were right I welded them up


I then made these brackets for each side to bolt onto the adapter.


This is what it ended up looking like.


I had drilled holes in the tops of each side for a bolt but realized there was no way I was gonna get a wrench in there to tighten them so I had to drill big enough holes in the bottom to fit a socket


For the frame side I made these brackets. They used the factory rear two holes from the stock brackets so I only had to drill and add thread inserts to two more holes on each side




Once I got it all done I realized that I just removed the crossmember that was structural to the chassis. So I had to make a new crossmember. I used a piece of cardboard to figure out what I wanted and then made it out of steel


This bolts onto the frame side of the transmission mount brackets and also hangs low enough so I can eventually add a skid plate to it.

Last edited by OPCJeff; 08/11/17 at 10:08 AM..
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Old 06/01/16, 02:37 PM   #26
OPCJeff
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The Coal Burner Bronco

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Once I got all of the mounts done it didnt take very long to figure out that my front driveshaft was going to hit the engine and trans pans. I wish I had foreseen the diesel before I got the HP frontend but it is what it is. So here's how I went about cutting up the pans. I thought the easiest way would be to take a piece of flat stock and bend in into a 90. The I was able to use a sharpie to outline the exact shape of the pan on each side. This worked out really well and didnt leave me with a bunch of extra welds and special pieces that needed to be cut. I just had to make sure I cut the pans in a straight line.
Heres the engine oil pan


You can see here where I outlined the pan.


And getting tig welded.


And same thing on the trans oil pan




And all welded up. Gotta say thanks to my buddy Dave for helping with the tig welding. we had no leaks on both pans on the first try so he did an awesome job. And they look good too!

Last edited by OPCJeff; 08/11/17 at 10:07 AM..
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Old 02/01/17, 10:11 PM   #27
OPCJeff
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The Coal Burner Bronco

Orange, CA
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Well its been a while now and I've been driving the Bronco like crazy, using it like it should be used and its finally showing some issues. I've been putting it off for a while but its time to get back on it.

I took it up to MOAB and i found that the track bar is hitting the oil pan when the passenger tire comes up. So I guess Im gonna have to make a new track bar. Fortunately I have a friend with a forklift to help me figure it out



Last edited by OPCJeff; 08/11/17 at 10:07 AM..
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Old 02/01/17, 10:16 PM   #28
OPCJeff
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The Coal Burner Bronco

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One thing thats been bugging me is that I've had a new Ron Francis wiring harness that I've been itching to put in so last week I finally got around to installing it. As you can see the rats nest of wires under the dash was extreme. I'd like to eventually get my overhead console up and running but I wanted to get the wiring worked out first. And I really need to get gauges so this will make the install a little easier and cleaner i think






Everywhere I looked there was more and more wires. The old harness was good but the Ron Francis wiring harness let me route the wires where I wanted and it also gives more spots to hook up accessories that this harness was lacking. Which is exactly why there was such a mess under the dash because I had to splice into it to get power for different things and over time it turned into this


As you all know under the dash is a little tight on the Bronco so I took out the air intake box so I'd have more room to work with and it helped A LOT


Here's the Ron Francis Harness Kit I bought. I believe its their express kit so it doesn’t have some specific connectors that are stock to the Bronco but it has a bunch of other features that I think are gonna make my life way easier when I start hooking up accessories. And even hooking up the transmission control was a pleasant experience


This is the fuse block and the only spots that are used for the majority of the wiring are on the bottom. All the side connection spots are for accessories like fans or power for my CB or whatever I want

Last edited by OPCJeff; 08/11/17 at 10:06 AM..
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Old 02/02/17, 10:35 AM   #29
thorgan
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Sacramento
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Would love to know what kind of fuel economy you're getting with that 4BT. What are you using to control the transmission?

I'm too sentimental about the big grumbling stroker 351 I've got in my '69 to consider swapping to a diesel but I have toyed with the idea of an old Scout 80 with the new Cummins 2.8 as a commuter.
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Old 02/02/17, 11:04 AM   #30
OPCJeff
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The Coal Burner Bronco

Orange, CA
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The best mpg so far has been 24.5 on a trip to san diego and back. Im in orange county,ca. Since then I've tried messing with the pump to get some more power and though ive gotten a little bit more power my mpg went down. last i checked I had 16.5 city driving only. My adjustsments just caused me to burn fuel with really not enough power gains to make it worth it. There are many ways to fix this problem and I have all the parts to do it. More power plus better mpg

I hear you on the small block. I had a 347 stroker in it before and it was a lot more fun but when the wifey got pregnant I had to make a decision on if I could drive it everyday or not. So I went to a buddies house and tried his car seats in the back and they both fit so I built a new "family" roll cage and put the diesel in. I drive it every day and love it. The kids love it too so its all good.

Quote:
Originally Posted by thorgan View Post
Would love to know what kind of fuel economy you're getting with that 4BT. What are you using to control the transmission?

I'm too sentimental about the big grumbling stroker 351 I've got in my '69 to consider swapping to a diesel but I have toyed with the idea of an old Scout 80 with the new Cummins 2.8 as a commuter.
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37" tires bronco, 4bt cummins, 4x4 bronco, diesel bronco, early bronco

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