if the car is gonna be all apart and you have the doe.

get the engine built. or order a built one.

get your fuel system done.

get your intake exhaust and intercooler done including intake manni tb exhaust mani turbo all piping yada yada yada

get some axles a clutch a flywheel yada yada yada

i listed obvious stuff seein as that you wanted more power and its gonna be apart might as well throw down the cash now and build it