200 with a 460 Big Block ZF tranny

[t120r]

So the other day I laid the 460 block plate on the floor. I laid the 200 block plate on top of it. Looks like a 200 can be easily adapted to the 460 big block ZF transmission. The Bronco needs a 2" body lift (Thanks Landshark99) to fit the ZF and the clutch disc would need a 1.250" x 10 spline pilot. Might need to be custom made. Seeing as I am relatively new to the inline sixes, I am sure there is something I haven't considered. Any comments or suggestions?

 

[Viperwolf1]

Add in the custom flywheel too. Then you'll need some really deep axle gearing if you even want to use 5th gear.

 

[broncnaz]

Easy is one thing cost to make it easy is the big deal. There are easier tranny swaps out there. The NV3550 or AX15 for one. But as was said 5sp in a 6cyl bronco really needs low axle gearing. Them sixes barely push a bronco as is.

 

[t120r]

The NV3550 costs about $900 in adapters... That's roughly $1200 once I get it to my door in Canada. Then I need a tranny. I already have a couple of big block ZFs.

My EB has 4.11s. With the mods I have planned it should be ok on the highway.

Why would I need a custom flywheel?

 

[Viperwolf1]

The biggest clutch used on a 200 was 9" and the flywheels are tiny, something like 136 teeth. You need one that is the same diameter as the big block flywheel so the starter can bolt to the bellhousing and actually engage it. I don't know if the 200 crankshaft bolt pattern is the same as anything else but I doubt it is. Then there's the balance to figure in too.

 

[t120r]

Well a custom 9" clutch disc would solve that problem. I don't see it being an overly hard conversion. I'm 1/2 ways considering it.

 

[bmc69]

Well a custom 9" clutch disc would solve that problem. I don't see it being an overly hard conversion. I'm 1/2 ways considering it.

You have that backwards. What you would need is a large custom flywheel for the back of the 200. Then you would use the 11 or 12" clutch and the BB starter.

Or you could have a billet adapter plate made that uses the stock starter location and the stock 200 flywheel. The adapter kit for the flathead V-8 in our '69 EB is sorta like that...except it still required a custom flywheel and a custom starter nose.

I can think of a bunch of compact OD trannies I'd consider adapting to that little 200 before I'd ever try adapting a big block ZF though....

 

[Broncobowsher]

I thought the Broncos got a 10" clutch with the I6, except the very early ones that had the 9" car clutch?

 

[Justafordguy]

Just put a 460 in the Bronco, problem solved.;D

 

[t120r]

Just put a 460 in the Bronco, problem solved.;D

You seem to be seeing my future plans

 

[broncnaz]

4.11 gears dont even come close to what that 200 will need with a OD tranny. Especailly if you run larger than stock tires. While it may seem simpler and cheaper since you have a ZF by the time you pay for a custom adapter and flywheel and all the rest of the needed mods how much do you think that will run you?
If you want cheaper OD find you a mid 70's 4sp OD tranny. its about as cheap as you can get.
Or better yet think your 4.11 gearing is fine stick some 33in tires on your bronco and see how it does on the hiway. That will be very similar to what the OD gear will be like.
There is really not a low cost OD no matter what route you take when your running the 6cyl. Even with a V8 your not much better off cost wise.

 

[73azbronco]

I would think you want to save the money for better options if you really plan to wheel either with the six or upgrade to a V8.

Unless of course you have a machine shop to do the work. And according to your picture above, I'm not seeing anything lining up to make it easy.

 

[Viperwolf1]

Just put a 460 in the Bronco, problem solved.;D

Or even just a 400.