My 87 GN has 22K miles, ta49, 009, TH D/P, hotwire...etc
Last weekend I had it out for a cruise and got on it a bit. 20 lbs of boost with a mix of 110 and 93. FP at 48 PSI.
Heard a few popping sounds..then limped it home and smoke emitting from under the hood.
Pulled the valve covers and am...