The post said "hyper pistons" meaning hypereutectic, I would say you could probably get 400 hp from a 351W and be reliable naturally aspirated. As far as how fast you can go, it all depends on your car, weight, rear end, tranny, your driving. But if you want, put 400 hp and your cars weight into the mustang analyzer and see what it says.
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Michael Black
QuantumMotorsports
Norman, OK
1984 LX Hatch
306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat.
Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites
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