02-03-2004, 11:48 AM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
500-600 is do-able on an older block....60's or 70's...because of the thicker castings. I wouldn't see any harm in it as long as you had 4-bolt mains or used a good girdle....I have 500 hp in mine...it's a 79 351W block....got a girdle on it.
With that much hp on an N20 setup, however, I would really think about o-ringing the heads....and definitely use some good rods and non-cheapo pistons....
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