So in my quest to find a correct "YB" block, what casting should I be looking for - my dad's '72 is a late '71 build.
Am I looking for the #677 or the #428?
Is there a consensus
yet as to what a '72 HO should have in it. I have a '73 SR in the car right now...
TIA
Andrew
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[B]Looking for a '71 casting rochester 7042270 - have a '72 dated 7042270 that can trade?