[BobS]

Fleabag,

How do you intend on making up the 1/2" difference in thickness between the thinner Ford/Borg-Warner flywheel to the thicker Chevy/SM-465 flywheel?

BobS

 

[BobS]

The ring gear on the auto & manual flywheels are both located the same distance from the crankshaft mounting face. This is why all of the 4BT Ford and Chevy versions permit swapping starters between them. If you take both versions of the manual flywheels and examine them they are identical with the exception of the thickness and the pilot bearing bores. The Chevy is thicker by about a half inch from memory. You are correct because it would move your clutch assembly forward on the splines by 1/2 inch and you might run out of spline length. The pilot bearing could also become an issue. There may be a couple of ways around this such as fabricating a spacer for the flywheel clutch mounting face but balancing could become an issue. The other way could be using a Dodge NV4500 as in the build up thread by Driverswanted and making a thinner spacer/adapter between the trans and bellhousing. Some experimenting would be required to find the exact thickness required for the trans to bellhousing spacer. I think this method would be the safest and cheapest way to go.