Well, I just bought a motor/tranny and was told it was a 37, but it has 24 studs not 21. The rear of the block is marked "59" with a small"A" stamped in below the 59. The serial number on the transmission(assuming it is the original) is *BBI8-46I306*. The style of the heads are the 38-48 with center water outlets. It has a three bolt distributor with the side exit wires(4 per side). The tranny also has something I have not seen before, A rod along side the shifter that you pull up, I am guessing for reverse?
Also the motor was rebuilt by a Ford authorized reconditioner called Bison Mfg in Montana I believe. It seems to be in real good shape so far, I pulled the clutch of and the flywheel/clutch/pressure plate are excellent, The oil pan is off and all looks good below. I have yet to pull the heads as I am soaking the nuts to prevent breaking any studs off.
Any help on identifying the exact year would be appreciated.
Thanks,
Ralph