The FAM dimensions call out 8.0 inches center to center of the 7/16 x 11/16 slots in the front crossmember for the two bolt radiator support mounts. Here's two photos from the FAM. Interestingly enough, the two bolt mounts don't indicate any cushions, but the single bolt mount does, unless the 378516 SHIM and 2692225 BODY SHIM are made from rubber. Note that the center support has a threaded plate for the two bolts from the bottom, while the two bolt support uses carriage bolts inserted through the top, with nuts on the bottom.
I'd almost be inclined to modify the radiator support for the wide spaced mount. The FAM indicates that it has cross bracing rods, while the center mount radiator support has no cross bracing. It wouldn't be hard to add those with some 1/4" steel rod welded in.
Kevin 1951 Chevy 3100 work truck Follow this saga in Project Journal Photos 1929 Ford pickup restored from the ground up. | 1929 Ford Special Coupe (First car) Busting rust since the mid-60's If you're smart enough to take it apart, you darn well better be smart enough to put it back together.
