chassis jig design

[wellis77]

I could easily lay 2" x 4" box tubing crossmembers across the top surface of the I-beam jig, set the current frame/cab/bed on those crossmembers, and establish my ride height. I could then weld supports to the rockers, bed, etc to secure the truck to the jig. I then can remove the cross members and the old frame and leave the shell of the truck and build off of that at ride height. However, to ensure the truck "lays" frame, I would have to use outriggers that elevate my wheels and tires 4" above the jig to ensure I have the travel and clearance to lay frame?

Welcome! Glad to see you made it.

I'm using air suspension on my build as well, though I'm not planning to lay frame. On my build I'm adapting Viper suspension to the chassis and need to narrow the track. In order to figure out how much I'm going to narrow, I am doing exactly what you described in order to simulate full compression of my shocks and then check for fender clearance at full lock. My shocks compress 2.1 inches so I'll be laying a 2x4 tube across the jig to simulate both wheels in full compression at the same time. When I build my rear wheel tubs I'll do the same thing. Though by then the car will hopefully be on the ground and I'll just drop the car down.