351C in an Early Bronc

[Desert Thrasher]

[quote author=cjjhalfcab link=board=5;threadid=16289;start=15#msg124927 date=1050443466]
I know the pan I saw in the u-pullit yard was in an early '80s 2 wheel drive, and it was rear sump. If I could get in there enough to get it out, I'd snatch it. Did you ever get HP/torque figures before the headers? I'd be interested to know what kind of power your Cleveland puts out.
[/quote]

Yeah I had my engine dynoed before the headers. With stock 1975 2v heads and manifolds and not tuned at all, and with a stock style paper airfilter and 35" tires with 3.50 gears I put out 195 hp and 216 ft lbs at the rear wheels. Not bad, I cant wait to run it again with the new headers and K&N filter and 4.56 gears ;D ;D ;D And when I get those aussies done I cant wait to see what it puts out then

 

[TexasBronco]

Those of us who have a 351C what type of tranny are you running? I bought a C4, it came from a bronco, and I am mainly wondering how this will hold up behing that power? Anything I can do to toughen it up?

 

[68beast]

I just bought this car an cant really tell you of how it handles(havn't drivin it more than 5 miles) but I looked through the records supplied with the car an found that the 3 speed manual currently in the car was a used transmission installed in 2000. I dont know what the cause is for the install but can tell you that in the 5 miles I've driven it shifted fine and seemed to work well.

 

[4byford]

68 beast,
It sounds like you may have to remove the rocker arms and use two jam nuts to remove the screw-in studs, if there is no hex head at the base where it screws into the head pedestal.

NOTE ON OIL PANS: The 351M/400 was used through 1982 in Ford trucks, so you can find the appropriate rear sump oil pans for a Cleveland on 77-82 donors.

 

[cjjhalfcab]

"NOTE ON OIL PANS: The 351M/400 was used through 1982 in Ford trucks, so you can find the appropriate rear sump oil pans for a Cleveland on 77-82 donors. "

Yep. I checked at the yard, and in addition to the '82 with an M-block and rear sump, there is now an '80 with the same set up. They want $9.50 for a pan, so some day when I have time I'm going to borrow their hoist and lift them enough to snag at least one.

D.T. -- those '75 heads should be the restrictive exhaust port models. You should notice a big improvement with the Aussies, for breathing if nothing else. I'm sure the extra point and a half of compression won't hurt.

68beast -- I'm not too sure what you're talking about with the rocker arms; 351C/351M/400 engines used a bolt-down rocker arm on a pedestal. The 351 Boss used screw in studs and guide plates. Unless your heads have been machined/modified to use the screw in studs, or unless you have Boss heads (you lucky dog), pulling the rockers shouldn't be anything more than just taking out a bolt. If you have pressed in studs, you don't have a 335 series engine. Make sure it isn't a Windsor.

 

[68beast]

while taking off the rocker arms, one of the nuts that hold the rocker arm on the rocker studs acctually removed the rocker studs from the head. this only happened on one of the studs and let me know that the rocker studs are threaded into the head. the reason i need to take off the rocker studs out is that they are holding down guide plates for the pushrods. theseguide plates are in the way of the bolts that hold down the heads to the engine. In some of my engine rebuild books it shows rocker studs that have a hex shape above the guide plates allowing for the rocker studs(and therefore the guide plates) to be removed using a wrench or deap socket. The studs currently in the head are perfectly round giving me no war to back them out using a wrence. I think using two nuts as described above will work fine.

 

[thesnake]

On my 76, they ran with a c-4. The po had just had it rebuilt when I bought the bronco. Whether that's any indication...

j.d.

 

[cjjhalfcab]

[quote author=68beast link=board=5;threadid=16289;start=15#msg126155 date=1050856348]
while taking off the rocker arms, one of the nuts that hold the rocker arm on the rocker studs acctually removed the rocker studs from the head. this only happened on one of the studs and let me know that the rocker studs are threaded into the head. the reason i need to take off the rocker studs out is that they are holding down guide plates for the pushrods. theseguide plates are in the way of the bolts that hold down the heads to the engine. In some of my engine rebuild books it shows rocker studs that have a hex shape above the guide plates allowing for the rocker studs(and therefore the guide plates) to be removed using a wrench or deap socket. The studs currently in the head are perfectly round giving me no war to back them out using a wrence. I think using two nuts as described above will work fine.
[/quote]

That makes a little more sense, but if the studs are threaded into the head, and there isn't a hex above the guide plate, what is holding the guide plate to the head? The guide plate should sandwich between the "hex" and the head.

 

[68beast]

I looked at the stud that backed out while taking the rocker arms off and noticed that the threads that go into the head are a different size from the threads that go through the rocker arms. Where the two thread sizes meet there is a lip that is holding down the guide plate.

 

[Madgyver]

68beast,
Is this what you have?

If it is,
You have the 'Crane Pushrod Guideplate and Rocker Arm Stud Conversion Kit (52655-16) for street applications, enabling the 351C-351M-400 cu. in. engines with pedestal mounted rockers to have adjustable rocker arms without cylinder head removal or machining.'
Look on the bottom of this page............ They have a special tool to remove and install this but it could be done the same with two nuts and locking them together.

 

[cjjhalfcab]

I forgot about the Crane conversion.... Now it's clear.

 

[6677ebman]

Would any of you guys be interested in a '70 351C 4V?? I have one, located in AL, if interested email me earnest@pepperlink.net

 

[68beast]

you guys are great. That is exactly what I have. Let me tell you Im only 15 and around here there isn't much knowledge about cars and engines. Expect to hear from me a lot in the near future. Again thank you for your help. Im gonna try an post some pics real soon so you can all see what Im working with.