Welding body seams

You'll want to make a LOT of SPOT welds using a MIG. I also used holes on the outside to attach the overlap points. Also, if your making a lap joint I reccomend a panel flanging tool. You'll use much less filler later. On a 3rd note the preferred way is to TIG weld it, reason being that you can hammer on the welds with a body hammer. MIG welding makes the metal Hard.

I MIG'ed mine 1000 little spots.