Re-gearing an Alpha 1

[Jetpig]

I have an Alpha 1 drive geared for the previous 4.3L which is a 1.81 ratio. I will have to re-gear to a 1.5 ratio for the new 5.7L which I will be installing. Anybody swapped out these gear sets before? If so, how difficult? How much $$?
thanks!
Jetpig