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Originally Posted by pjdutton
Sorry for lack of info.I want to fit these to a 400.Machine work is not a problem.Over here in the uk you use whatever you can get your hands on.THE studs on the 94 heads have been pulled and I was thinking of fitting B/block chevy studs.These 94 heads have smaller combustion chambers so I will up the compression a bit but I don`t know if the ports are better or worse than the 6x heads.
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use the 6X with BBC studs...the studs will screw right in.
Pontiac used a 7/16" for the lower section, and tapered to 3/8" at the top.