What's a good intro welder for subframe connectors?
I have a Hobart 180 and a Lincoln 175...both great units.
An argon mix will weld better with a prettier weld bead but straight co2 is good,too.
I don't suggest a flux core welder unless you are an experienced welder. Most amateurs have a tuff time getting a decent weld with them.
As far as HF welders their newer units have a better reputation than their earlier deals.