T56 Trane mods
As everyone else said, the T-56 are heavy and big. Looking from the side, they are tall, and from the top they are wide. Many don't come with cable speedo drive. I don't remember correctly now, but I think the Vette had a rear transaxle, so their T-56 were not easily adaptable to "normal" rear drive cars.........hence why you may see them cheaper.