Hy NRC, welcome, while cletis is correct that the year and size of the truck in question is very important, there is no factory bellhousing that will allow the SM420 and has the mounts for the clutch and brake pedal. One of the members here came up with a plate that can be bolted to the flat machined surface of the bellhousing and support the clutch/brake pedal. I couldn't find the postings about the plate yet but I'll keep looking.
