Thanks for the info on the flange, I remember something like that years ago.
I had a '63 Valiant with a 170 and auto. The engine eventually was worn to the point the pistons were swapping holes. I wanted to put a 225 in it, and was buying a factory rebuilt shortblock. I found out I needed a 225 for the core, so I did a marathon 3 engine swap to end up with a 225 core on the floor, and the 170 in another car that was going to be sold for surplus.
The swap was with a Dodge U.S. Airforce crewcab flight line pickup (with a big 4 speed). Myself and a couple of buddys did it at night in a repair shop, and it was a nightmare, as it went on all night with swaps of parts between engines to end up with two running vehicles. One of the problems was there was a diferent flange on the pickup, and the flywheel wouldn't fit the 170 which had an auto, so we swaped the cranks, what a mess. Fortunately the new 225 worked with the old flex plate.
