The Mach 1's still have crappy rods and pistons even though they have a forged crank, so they aren't good for much more hp than a stock GT bottom end.
IMO an entry-level type blower (smog legal, 6-8 psi) with bolt-ons is fairly safe for a stock short block in a GT as long as the tune is good. Any more boost than that and I would start thinking about beefing up the bottom end.
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Strike down the unroadworthy!
2000 GT Atl. Blue: '03 Cobra motor - 465rwhp/473rwtq, T-56 6-speed, full MM TA/PH & tubular K-member suspension, Saleen body, 17" Torq-Thrust II's, M/T ET Street radials, and lots more
'94 Rio Red Cobra: All the bolt-ons, 3.73s
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