OK now it seems I stirred up a hornets nest but old jed the truck has a flat head motor I will wade the snow and get a pic.
I was told it was a 55 chev drive train motor to rear end.the tranny looks the same as whats in the 53 and the rear axle including the rims and bolt patern are identical to the 53 now I dont want to upset anyone but here is something to consider is it possible that a motor could have been put in canadian trucks but not in US trucks or was it only ford and dodge that had flat heads.Regardless this head is flat and its bolted to a chev tranny if its not a chev engine the old farmer was a darn fine shade tree mechanic and jed the truck is even moreclosely related to Johnny Cash's Cadillac than I thought.