You couldn't get the angle without deforming the tube plastically and that weakens it.

Plus these are mild steel and relatively thin wall (in welding terms). MIG welding them together SHOULD get enough pentration, and could be enhanced if a slight chamfer is given to the butts. We ued to weld box tubing like this all the tim in the mine in worked at, for structural members and never had an issue. Some of the test tooling, for wheel end simulation, at my current place of emplyment is made the same way and it holds up to HUGE lods. I don't think you have a thing to worry about.

2000 SVT Turbo 295hp/269ftlb@12psi #1 for Bendix Brakes Kits! Knuckles rebuilt w/new bearings $55 AUSSIE ENDLINKS $70 Gutted pre-cats $80/set A lack of planning on your part does not constitute an emergency on mine!