[68GMCCustom]

with a 6.0L swap and turbo350 changed to a 200-4r... I had to have a new longer shaft made because I decided to locate the engine on sbc stands in the proper forward mounting holes to provide some room behind the motor for the coil and MSD box w/o having to cut the firewall. But had I chose to mount the motor with the 6cyl stands and motor mounts the sbc was originally on (using adapter plates)...the original shaft fit fine.