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Re: Orphan 1968 427 block
Edited by sluggo on 11/17/2017, 2:35 pm
The 1968 corvette used this same (321)block casting number(not suffix) and was rated at 390hp with a low profile q-jet intake manifold. In the full size cars the IS/IJ was rated at 385 hp. My Z-24 is an IS coded suffix.