Smoothed out the dimpled areas on the firewall and dropped the cab back on the frame. This time I had an adequate amount of room around the valve covers and HEI, so I left the cab on for now. Need to shim one corner very slightly and then torque the body mounts down before assembling the front clip. With the cab now in place, I could see the stance was not where I wanted it, but that's easily fixed with the air suspension. I let some air out of the back and got the rockers sitting closer to level. No use programming anything in right now until all the weight is on and I can get the truck on level ground. My workshop floor is sloped to a drain in the center, so there's precious few level spots. If you squint real hard, it almost looks like I'm making progress.