Swapping from iron to aluminum heads

Front end... loosen it up A LOT.

Tire pressures? My guess, run them up in the low 20's. If you are in the teens, it's likely too low. Sounds counter to what most think, seems to work well on et street radials. I've worked on some mid-high 10's 275/60 cars that guys ran mid teens pressures, boosted pressures and all the cars picked up 60's.

If you cut .1 out of the 60's, its usually at least .15-.20 on the other end

Don't want to hijack the OP's thread.