screamer or not?????????????

[sideways danny]

dont need to think about an external wastegate at that power IMO. FAR worse issues to think about first, like management/fueling (you'll need bigger injectors) intercooler, exhaust.

A T28 from an s14 on the standard manifold should do what you're after

[CNHSS1]

yep agree with Danny, the fabrication aint worth the grief