H or Combine motor?

1940 Farmall H, Block was rusted solid, inside and out, found a motor in my uncle's garage that was overhauled completely 25 years ago by my late Grandpa, it's never been run but it turns free. (he cranks it over once a year when he walks by it) My uncle isn't sure if the motor came out of an "H" or a combine. The motor looks real similar to my other H's. I do have the serial numbers off the head and block, are there cross reference books to see if it will fit? or what's the next move?

Brad

A word of caution: after 25 years without being more than just turned over that engines rings will probably be stuck. Expect oil consumption for a while until the rings unstick.

Steven

The same H had Baaaaa ad Gas...in the tank, smells like turpentine, plus there was an inch of grey clay in the bottom of the tank, after rinsing with some acid, round rocks and assorted other methods it's not bad, but is there something to make it sparkle?

Just picked up an f-20...it's stuck, a guy wants to give me a working condition/been stored 1969 IH503 combine...need to move it 300 miles, plus I'm still working on an f-12...piston won't come out without the sleeve, but I'll ask those questions later.

Thanks,

-Block #s:
Flat smooth spot on mag side, top "middle" of motor = 34693ht.

Numbers are also stamped on the block, mag side, top left too, they are 358261r1.
and,
the Head is 362533r1.