Never have heard of one ,but you can check quicktime bellhousings they willhave BHs for the more common tremecs and six speed application..btw this 400 you are using is it stock ? all most all 400s are smog motors 8:1 compression,but respond well to Stroking.. a more modern piston would help it.. A 360LA or MAgnum would be lighter more powerful alternative just my JMHO