04-21-2014, 08:15 AM
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CC Member
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Join Date: Apr 2003
Location: alb.n.m.,
NM
Cobra Make, Engine: contemporary cobra
Posts: 80
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Not Ranked
c6me is a 66 390 or 428 those are the only 2 that used that block # the way to tell is lift it and look at the flywheel it will have balancing weights if its a 428 if not its just a 390 both are excellent motors.also the heads will have a 4 bolt pattern on the exhaust ports if its a 428 cj 
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