The long 302 / 5.0 engines are a hard squeeze into a flathead engine compartment. You will want to use the 6 cylinder radiator setup. A better swap (and I may get a lot of flack for saying this) is a small block chevy. The off brand V8 is a bolt in swap with the short water pump, conversion bell housing, and front mount plate.

 

Ive got a '71 351 Windsor going into my '46. My truck was originally a 6 cylinder truck, so I have the advantage that I have the 6 cylinder sheet metal radiator panels. But they are easy to find used or modify the 8 cyl panels. All you have to do is move the radiator to the forward mounting holes and either trim or replace the lower grille panel with a 6 cylinder version, which doesn't have the extra 90° bend. For the upper panel that has the hood latch, either trim it or replace with a 6 cylinder panel, which do come up on eBay.
For the frame mounts I'm going with the weld in ones from Speedway. The frame will be boxed at that part. There really isn't much extra work to put a SBF in one of these trucks instead of a SBC. The 5.0 HO is a great engine. I've got an '86 GT with EFI 5.0/ 5 speed and it sure does move.

 

Hi--I have a 47 panel just like yours and am now starting a refresh project. Any current photos?

In case you have any extra parts, I need a radiator core support and the link that the front shock absorber connects to. The other end of the link attaches to the frame.

Thanks for any help! Looking forward to seeing the status of your build.

Tom Smith
Southern California

 

Sadly '64 MP&L hasn't been on-site since 2015.