If you look at the 56 chevy in the link posted, that is what I got in mind, only mine will be a little stronger done the way I'm thinking. Don't have pics right now. I was wondering if 1/8 inch wall will be stout enough. You got to keep in mind that the eng will be set back and the rear mount for the spring will be at or behind the welded sub. I will use 1/4 to do the boxing. If I do this, I don't want the sky high stance, so I want to keep the front rails at the top of the stk frame, that'll leave a little over a inch gap at the bottom. I was going to plate it with 1/4, and then gusset it at the bottom if that makes sense.