I have the exact same problem on #2 (plug always wet with oil, fouls, ocasionly backfires on hard shifts) but good compression all around, although the rings are worn by wet/dry test.
I now belive it's sucking oil between intake & head as i home gasket matched both and proably went to far on intake.
I'd like to try the test PKRWUD suggested but I don't fully understand:
Hook vac. guage to intake where?
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88 GT: subs,pullies, 1 3/4 longtubes, flowmasters, AFR 165's,T,F #1 cam,Thyphoon intake, 24# inj., 73mm C&L,65mmT.B., 190LPH pump, Eagle sir rods, forged pistons in a newly rebuilt 306.
DYNO TUNED TO 300.97 RWHP 337RWTQ
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