Quote Originally Posted by techinspector1 View Post
Oh, one other thing. Put jackstands under the frame rails and level the truck. Don't weld the plates in with the truck sitting on the tires.
How about using a 10ft x 20 ft by 2inch thick steel plate table instead of jack stands? Thats what i used. Made a jig by welding brackets to the table to hold the frame straight everywhere and also make sure it wasn't higher or lower on one corner, used 6 ft long plates (3 per side), welded it in pretty good without taking it out of the jig, then took it out to finish welding. Put it back in the jig, no tweaks, warps, nothing, probably straighter than it was new! Oh, 49 chevy pick up frame, boxed with 3/16", welded solid, ground smooth so you can't even tell its boxed.