Hy CAJUN CRAW FISH and guys, I agree with Grigg on the spacing of your reinforcement, and I agree with Mike B and Builder on the angle or notch cut, personally I prefer the angle, one direction on one side the opposite direction on the other. I would not box the frame, it may make it too rigid, and transfer stress to an area outside the boxing. Most dump kits come with some kind of a subframe to bear the stresses of the lifting action, so boxing the frame is not required. There is a section on frame repairs in most maintenance manuals, have a look at that, there are some useful tips on welding frames and reinforcements, hope that helps.
