ST165 help

A buddy of mine is looking to get a 1988 alltrac, wondering about the limits on the stock engine management system. (max boost with stock internals, stock clutch, stock ecu) Pretty much we want to know about how much the 88 alltracs can hold while still making the car a fun daily.

roughly 12-14psi on boost and 400 on the stock bottom end. now that consists on the condition and everything else as well.