[NELSON111]

>>>but GM made engines for them so the photos may be GM.

I thought the engines for the B-24 were the Pratt & Whitney Twin Wasps - No?

[Bonemaker]

"Not many of you may know, but Buick built over 74,000 Pratt & Whitney Twin Wasp radial engines for the Army Air Corps during WWII."

I don't know that kind of information off the top of my head so have to search it out. One source is quoted above.