Not Ranked
I just did a little math on that bore size, man I GOTTA be missing something here. If the block deminsions (bore center) are stock at 4.38 and the bore itself is 4.12 that leaves a cylinder wall thickness of something like .026. The 427 FE is considered a "thin wall" casting and it is twice as thick as that, coming in at over .050. Whew, these 427W's are "out there" on the ragged edge. No way your going to be able to bore it out if you loose a piston and need to rebuild. It would have to be a sleeve.
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