I repaired a bunch of rust on a 59 3100 with oxy-acet and metal coathangers. It really is not that hard, if you know the basics. the heat zone is larger then other methods, but that can be dealt with too.
Eastwood sells an oxy-acet torch that limits the heat zone, and it is a lot cheaper then migs and tigs.
But now I have a Millermatic 175 mig that I have yet to use for body work.
