Its pretty snug in there, but it fits and doesn't move. After stripping and sealing the frame, I did all the work to the cab floors and corners and rockers new seals. New fuel lines and brake lines, 2 layers of thermal and sound deadening insulation, and rebuilding the motor it only had 250,000 which is nothing but I wanted to start fresh, so it was totally rebuilt new everything. Its got a stud girdle, arp head studs 90lbs valve springs for my exhaust brake, and a fire ringed head and head gasket, I made a 4" exhaust from the turbo back. Retrofitted the intercooler between the grill and radiator support. This is the first week working the bugs out. But im very happy to have decided to do it