Tailpipes out the back will help a bunch. What do you have for motor mounts, is it a solid driver's side mount?
You can consider a pair of resonators as well.
Which 6th gear do you have, the 0.50?
I have the standard 67-72 motor mounts. The biscuit style I believe so there seems to be some wiggle room. I have to see how much room I have for resonators. And my final drive ratio for the trans is 0.63:1. I'm running 3.55 gears on a 26" tall tire. But doing the math, I may have the other transmission, which I hope not.
