I use a 25 year old Lincoln weld pak 100 with a gas bottle attachment kit from summit racing. It welds everything I ask it to weld. Make sure whatever you get has a full variable rheostat for wire speed, so you can "fine tune" how fast or slow the wire feed is. It makes a difference.
Practice on junk metal before you take a torch to the car. Read and practice a lot if your not a welder. It's easier to put in a good weld and be done, than to grind a shitty weld, or have to remove something and start over.
1/4" is really thick **** for a wire welder. Hope your not putting that stuff in your car. 1/8" plate and above you need to V notch the pieces for full penetration with a wire welder.
Welding in subframe connectors? Welding upside down sucks for experienced welders, let alone newbies.
I'm sure others will chime in with more. I wish you the best of luck.
