Right now the motor sits as is. A y8 head just ported and polished with a y8 intake manifold 450 dsm injectors wired to a resisitor box ,aem fuel rail,aem fpr.
The turbo is a t3 50 trim for now but im getting a gt3576R turbo in 3 months.

As for the bottom of the motor is a z6 with je pistons and crower rods.

i know that the top ends on d series can hold up to 25 psi but id still like to build the top end what valves and springs would you recommend and what camshaft. Cam gears would be and also big help.

Im sleeving the motor and want to push 28-30 psi.