Hi Bud,
John has pretty well answered your questions. He knows his 'Birds (among other things Ford). Here's what I found
The Ford part number for the ’55-’57 ‘Bird front engine mount in the '49-'59 Ford Car Parts Text Catalog is B6C 6028-A. The Ford ’57-’60 F100/700 truck 292 engine front engine mount part number in the '57-'63 Ford Truck Text Catalog is B7C 6028-A. The difference in part numbers makes me say that there is SOME difference between the truck mount and the ‘Bird mount. In looking at a Hollander Interchange Catalog for ’54-‘66, I can’t seem to get down to the front mount.
The ‘Bird and truck front engine mounts that I’ve seen offered on eBay sure APPEAR to be the same.
Per John Mummert’s web site, FoMoCo went to longer main cap bolts in April of ’59 with use of the B9AE-F blocks and continued use of these longer bolts through the end of U.S. y-block production in ’64. Earlier FoMoCo ’59 blocks are EDB-E
’55 cranks had no rear oil slinger adjacent to the rear seal. My recollection is that Ted Eaton has reported that he’s had no issues with 312 cranks turned down to 292 main and rear seal diameter where the shop grinding the crank had to eliminate the rear oil slinger. A used .010 .010 272/292 crank should bring something on eBay.
Regards