If you keep welding and grinding you will effectively weaken the material by reheating it and embedding impurities from the grinder into the steel and crystalizing the steel changing the molecular structure. Really just making the metal brittle is what I'm saying
The only real part that concerns me is in the first picture 3/4" down from the seam you have some cold lap/roll and a crack could start from here.
The other thing that I see an issue with is the bottom of your frame rails hang below the cross member. I feel to make this a sound weld it should have been cut .25" shorter than the bottom of the cross member and boxed in so it could be welded %100.
Will it be a problem???? Probably not, but a crack could start from the bottom and work it's way up.
You could probably just take a 9" and a blue wheel and cut it free hand pretty easy. Just take care not to gouge the cross member. Then box the end in and practice your overheads
Thanks for the advice. The bottoms were intentionally left longer because I have to install a frame connector that buts up against the vertical part of the rail and goes forward to the tranny crossmember. Once that is tacked in, I will trim it flush and box it in all the way to the 4 link brackets.
Thanks again for the help...I'll keep practicing those welds on scrap.
