Is this a P5007378? I can't seem to get a straight "answer" from various websites as to what part number this plate really is I want to sell it but need the actual P/N first!

It appears to possibly be an SFI hemi or possibly B-RB stroker crank flexplate. It looks like it also has 7/16 holes maybe . H.P. for sure I would think being it's solid.

Thank you. Anyone else? I really need a definite,exact answer with a part number if at all possible. The 4 holes on the outside are 5/16" and the crank flange holes are 7/16".

If you have the 5/16" convertor bolt holes, you have the P5007378. Fits a 426 8 bolt crank. For use with stock type or mild convertors.

P/N P4529752AB would be the same thing but with 7/16" convertor bolt holes. Fits 8 bolt 426 crank and is for use with B7M or other aftermarket convertors.

The convertor attaching bolt holes should be on roughly an 11" circle.

Sid