Just in case this is relevant:

A 6400 will have a handbrake lever for parking brakes near the floor shifter. The 50 pickup will be foot operated. The donor cab will require a new hole in the floorboard and pedal shaft seal (felt holder) which I think is spot welded. The 50 parking brake bracket, brake knob and rod, underfloor brace/bracket and associated linkage will be removed and installed on donor cab. Personally I like the parking brake lever better but that would require some fabrication.

Last edited by buoymaker; 06/10/2022 10:56 PM.
"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."