I've seen alot of T-5 conversions on small blocks, but has anyone done one to a big block? Would they hold all the torque? Is there any other option on a big block car to have an overdrive with a stick shift?
First, it really matters more whether you can actually develop the torque. That's a traction issue. That being said, although you can make a T-5 fit behind a BBF, I would opt for a Tremec 3550, Tremec TKO, or a Richmond 6 speed. If you could find a bellhousing the Viper T-56 might be an option. The Tremecs use the same bolt pattern as a top-loader and you can have a shorter input shaft installed to make it bolt right in place of a top-loader except for the x-member.