Originally Posted by
Peterpan1
A lot of chromo is migged including many stock car frames, but they had plenty of time to develop their proceedures on scrap. You are better off using a Chromo based wire, I had enough trouble getting that for TIG.
Not good advice! The only benefit of using e.g. 4130 wire would be if after all welding is done the whole thing was going to be heat-treated to some elevated tensile condition. The MIG equivelant of E70S wire is appropriate for what you are attempting.
Excellent advice from Peterpan1, however, that you obtain some old frame parts to practice on, adjust welder settings, etc.!
Edit: Make sure all parts to be welded are clean down to bare metal.