What clutch for a 440?

Looks like 10.5 was the only one used in Production. Not that 11" wouldn't work but header clearance may become and issue and you may end up modifying and/or fabricating parts to make it work.

Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists

Brewer's Performance - Mopar A833 4-Speed Transmission and Component Specialists