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There is a different one that has the lug in a different spot a little further away from the block, run into that with the 440 in my old motorhome took it back to the parts house and swapped it for a different year if I remember correct and it worked just fine.

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I think the issue here is that the OP is playing with
a BB and yes I had a clearance issue when I was building
mine... no problem on any SB

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