Thread: 428 h.o. red line
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Old 05-24-2001, 05:59 PM
Louis Louis is offline
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Join Date: Jun 2000
Posts: 23
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I have a 428 h.o. motor in my 69 SJ,it is stock with long branch exhaust manifolds,how high rpm is it safe to rev it to? 6000 6500? I think it is the fastest motor Pontiac ever built except the 63 S>D> motor.What do you guys think?

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