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.
Do you have tail pipes at all or just dumps at the axle ?
Schumacher sells shims that go between the biscuit and the K frame , but don't get carried away and change your drive shaft angle , I would try shifting the engine toward the passenger side instead of raising it because it could eventually settle back down.
Also you could grind a little off the steering box ... that is obviously more work ...
