3.6 would work for me. any idea what all would need to be done to make it work?

i want a bit of a lower final gear bc i plan on using my car at mostly road track events like track days at RA and TGP and I would like to have a bit longer gears. Plus I hate topping out at like 135 @ 5.5k rpms (power starts breaking up after that... ask mike to see my dyno or pm me and ill send you it if you want to see). Lower gear would also help out with traction when I go back to THP to get a few things fixed (specifically retuned to 16 psi).