All, I was able to get my hands on several motors in the last few days. I've been after them for a very long time and it just worked out. One motor and the block are still in original shipping crates. We got them back to the shop and I've gotten a chance to get some good pictures and pull a head/intake off one of them. These are military surplus motors that were shipped to NY at some point we stored for many many years and then saw the light of day this week. I've got 3 24 stud double pulley motors, 1 NOS block 59 type block, and 1 later 21 stud motor. Still have 1 more 24 stud 59A coming but not here yet. My plan is to keep the block and 1 24 stud motor for myself and sell the rest to fund the build. Here's a few pictures, but, what I believe I have are '41-42 blocks, these were double pulley, factory relieved, have raised intakes, rebuilt with new valvetrain and stored, they have what I think is full flow oil systems on them and split exhausts. The block I think is a '41 block based on casting number. Can you help verify. Know there are several folks on the HAMB that know all there is flathead wise.