Years ago I started using a 2x12 that's about 4' long for underdash work. One end sits on a work bench stool, the other lays in the truck floor. Every thing sits at an angle to the truck. I HIGHLY recommend it. A possible disclaimer; I'm 6' at about 165-170 depending on the week, so not a big guy at all.

Ron


RonR


1951 3600 with Clark flatbed, T5, 4.10 rear
1970 340 Duster
1990 5.0 V8 Miata (1990 Mustang Gt Drivetrain)
1964 CJ5