What is involved in changing the rear gears

[Dwight]

Dwight,
I do not know what spline axles my car has. I can tell you that there is a greater than average chance that they are stock. Pardon for the ignorance but you will have to explain to me what the .62 main shaft swap does. This isn't the 5th gear option that is always discussed when talking about TKO-600's is it? I've heard that it is possible to swap the .82 for the .64 but that it requires the tranny to be pulled apart. Sounds like you guys have a good source for the tranny and gear modifications.

Yes this was a TKO 600 5 th gear .82 to .64 swap. You have to take the trannie completely apart. Takes a couple of hours to do after you have the trannie sitting on the table.

Coach had a 428 / 461 KC 601 hp motor in his Hurricane. It would cruise at 2000 rpms. .64 5 th gear and 3.25 nine inch. Tires, not sure but I think 26" - 27" range.

Then he build a Unique with a 482 KC 620 Hp. Bought a .84 TKO but that is the one we changed to .64 after a year. Then it would cruise 1800-2000 range with easy.
Next car I have driven a lot is Lainhart's Unique with a '65 s.o. punched to 487 620 hp by Keith Craft. It has a 3550 with .68 O.D. 27" tires.
It will cruise at 2000 or less with easy.

It's all in the cam or mostly the cam.

My little 354 would cruise at 1300 rpms for miles with no jerking. We would laugh at it while we cruising down the back roads. I do have videos of it.


Dwight