If I had a 96-98GT, I would save as much as I could and get 99-01GT heads from a scrap yard. I hear people that have done this are making excellent power because of the better flow of the newer heads but also because of the higher compression ratio.
If you have 4-500, wait a little longer and save to get those heads used. I think you might be able to do the whole thing for under a 1000 if you do the install yourself or know someone who could help.
Good luck!
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formerly 96cobra89lx306
(96Cobra/softtop- Black&Tan, 3.73,almdrvsht,fancontrl,steeda sbfrmes,r-LCA's&shifter,eibachspgs,KYB's,FR-upper arms,Y2K Cobra R's,pulleys,Bassani X pipe(cats gutted),C&L 80mm,Stage 2 Clutch, polished intake and cam covers etc.. last dyno w/cats on-287rwhp.
93 Ford Probe Gt 4.39 stock gears and K&N (slower but turns)
2001 Green Ninja ZX6R
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