05-25-2003, 10:14 AM
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Administrator
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Join Date: Jan 1999
Location: Duvall,
Wa
Cobra Make, Engine: KMP286, Shelby 482, Webers, 593HP
Posts: 4,162
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Not Ranked
The 390 and 427 have the same stroke, so the way that motor sits now it's not "stroked". The 428 crank is the most common way to stroke it, and is externally balanced instead of internally like the 427 crank. Another alternative is the scat cranks that run about $500 which come in versions stroked further than even the 428's.
I don't know if there's any clearance issues to be concerned about in the 390's using longer stroke, so someone else can answer that.
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