Just so you know, NO aussie block had 4 bolt mains.
all our engines that had 4 bolt mains, were the GT spec engines that were imported.
Also I use felpro rear mains on all the clevos that I build, and have NEVER seen a different size rear main. I don't even think it could be a 351M rear main as I am sure they were not 4 bolt mains.
does it have ford part numbers cast into it ?
perhaps that can help ?
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