K-member at the end of its life?

No worries with that weld. All I have is the $90 HF Flux-wire welder and my welds often look similarly lumpy, but after grinding them with my $14 HF hand grinder to shiny smooth metal, they look great. My main problem is I can't see well with the HF auto-dimming helmet, so often think I ran a nice bead, then see it was off the joint. Anyway, I have fixed major issues, like a separated K-frame in my M-B where a shop's weld repair failed (for PO), so definitely paid for itself. I welded 3/8" steel trailer shackles to make a tow mount and got good penetration (turned blue on reverse side). A bigger problem is burn-thru on sheet metal like my Dart floor pan. The HF welder works great, just not for delicate work like a TIG.