GMC trucks used Pontiac V-8 engines from 55 through 59.
55-287, 56-316, 57-347, 58&59-336. They also used the GM Hydramatic trans.
Some of the larger trucks used Olds engines.
Dennis, I'll ask around. One of my friends had a Hydramatic trans done for his 57 Cameo a few years ago. It still works so I guess the shop must be OK.
Fred
