My son and I are tempting to put a 302 in his f150 1978. The big-block has seen it days. Anyways we are stuck at the flywheel clutch. I have a bell housing from a 1988 bronco straight six that bolts up. The flywheel we have is off the 302 157 tooth. I think we need a 164 tooth flywheel.

My question is what flywheel and starter and clutch do we need to make this happen. Also what motor mount perches do we need? The f100 has a manual transmission. I believe its a 351 big-block we took out?

Thanks for any help..

 

You'll need SBF mounts and a starter for a 302..EZ since the 302 were an engine option for these trucks in 2WD form.

What year 302 do you have? 80 or older or 81 and newer? This is important for flywheel balance... early ones use a 28 oz and newer were 50 oz imbalance.

Which manual trans do you have? T-18? It should be wide pattern. A typical 302 clutch should work but one thing you'll need to know is whether the trans input shaft is the correct length.

A 351, likely a 351M, isn't a big block per se... the same engine design can be a 400 through a difference in stroke... the engine family is typically referred to as a 351M/400. The same principle apples to the FE... it can be 352 cubes all the way to a 428 with no difference in external dimensions.

Dunno about flywheel teeth....

 

What year 302? Before 1981, they had a 28 ounce imbalance. 1981 brought a 50 ounce imbalance. The flywheel/flexplate and balancer MUST be correct or it'll vibrate itself apart.

If it's a 50 oz, an early 1990's 5.0 f150 will get you a 164 tooth flywheel. You can also use the starter and clutch from that.
Look for a 1979 f100 with a 302 for a 28 ounce one, along with the starter and clutch.
Make sure you use the manual starter, not an automatic starter, there are differences.

Edited the year change

 

'81-later 302 will not have the threaded hole on the left rear side of the block for a mechanical bell crank pivot.

This is a '90 Mustang GT H.O. 5.0L engine. Notice there's no threaded hole for a mechanical clutch. '81-later 302/5.0L blocks (both carbureted or fuel injection) will not have the hole there, just like this.

 

Thank you for the fast reply. Its a 1983 5.0 Mustang engine. It has the 50oz 157 tooth flywheel.. I'm not sure what transmission is in the truck right now. Correction: It is a 4x4 f100 1974 highboy.

All I know is its a 4 speed with granny..

I did use Small block motor mounts and the motor sits about two in. higher then the transmission..

 

Thanks. Yea I seen that, we are going to fabricate something there or maybe use a hydraulic clutch.. My son said one of the wholes lines up with the bracket?

 

It's not a highboy...

Your trans is likely an NP435 given it is an F100 as you allege.

I suggest figuring out exactly what yer working with before proceeding any further. Not having the right info could get expensive.

I retract my sbf motor mount comment since you got a 4x4... a fact.that would have been important to point out at the outset.

 

Sorry about that. Please don't give up on me. Here are some pictures I took maybe this will help you help me lol.. Thank you..

 

Block clutch pivot dapter bracket for '81-2001 302/5.0L engine without hole on side of block.





CPC Mustang Equalizer Bar Bracket Engine Side, 5.0L

 

That's the transfer case (a Dana 21, the same one I got)... it splits the applied power to the front axle.

Does your trans look like this?:



This is what it looks like installed from under the passenger side. It's a pic from a 2WD but yours would be the same given it has a Dana 21:

 

Wow unbelievable. That will work on this f100 right? Thank you sir...

 

Yes sir that is it!! Is that an NP435? Thank you..

 

That it is.... here's some info to building your knowledge base: The Novak Guide to the New Process 435 Transmission

The NP's input shaft has 6.5 inches of "stickout". I suggest comparing the depth of your FE and SBF bellhousings to make sure they are the same.

Btw, don't forget to install a pilot bushing in the 302. Party on.

 

Thank you for your time. Much appreciated sir!!!

 

HIO Silver

What do you think about using perches from a 70's f100 2wd? Would they mount in the 1974 f100 4x4 so that the 5.0 will bolt right up?