6-71 small block build.

Cope said
What would the boost be if I switch those pulleys to small pulley on top?

Thanks again!

Swapping the upper and lower pulleys will be 20% over driven, resulting in boost somewhere around 17PSI.

Cope said
A day in the hot tank, smooth out the cylinders, into the blaster, through the jet wash, chase the threads and paint her.

Hopefully no cost at the machine shop.

What head gaskets are you using? Cometics need a special deck and head surface machining to work properly.
If you’re not gonna have the machine work done, run a FelPro 1008 head gasket with the 7PSI of Boost.
If you’re gonna run the 17PSI of boost then run a SCE gasket.