Today I had the chance to install my replacement DennyT pin after installing the 366 spring. While I was in the pump, I bottomed out the star wheel too. A HUGE difference. Before the 366 spring my max boost was 21 PSI and EGTs peaked at around 1100.
Today I drove a while until the engine warmed up which worked out as I got onto the interstate. As I went down the ram (which is really level) and entered the road I floored it in 4th gear then into 5th. Boost immediately passed 25 and ultimately peaked at 28! I backed out when EGTs touched 1250 on the gauge. Smoke was very controllable, although I could get a nice cloud if I wanted. When I didn't get into the pedal too early smoke was minimal.
SO with that said, I'm touching 30 PSI. At what point should I start worrying about boost levels and my head gasket? As far as I know, this is the original gasket from assembly in '93.