I agree the best upgrade you can do for quick noticeable performance increase is gears. I also agree that stock heads are a bottleneck. We needed to replace the exhaust anyway so we went with long-tubes. We listened to several different exhaust setups and liked the sound of long-tubes with high-flow exhaust.
We can't go with new heads until we do away with the speed density in our 88GT. Looking forward to adding 3.73 gears, new intake and heads hopefully over the winter. Everything I've been told and read - we've also got to convert to MAF and get rid of the speed density.
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