[fastd]

Originally Posted by 8litercobra

I replaced a close ratio toploader with a T56 magnum. The T56 is big, but it fit in my Unique FIA with no mods, except modifying the rear crossmember for a different tranny mount. You'll have to do that with any transmission change. Also, obviously, had to mod the driveshaft

Rockland Standard built my tranny, and I have the 2.29 gearset. I wanted to get as close as possible to the toploader close ratio:
2.32, 1.69, 1.29, 1.00. I was afraid that a lower first would result in a first gear nearly like a pit gear. The gearset from Rockland is 2.29, 1.60, 1.21, 1.00. I'm happy with the result.....I can't tell much difference.

Since I was adding weight with the T56, I just had to swap out my iron block and heads 351W with a new one using a Dart aluminum block. 438", Kaase heads. I've been very pleased with that too.

Brent Lykins was very patient in working with me (I changed the setup more than once) to get the clutch/PP/etc I needed to make it all work (even though he isn't the biggest T56 fan!)

what rear gear ratio do you have?