Weld In Frame Connectors

I would hesitate buying a car that has those installed. Begs to question the cars history just like a trailer hitch. I probably will put those on a raptop I'm restoring but to scrub away long like of factory undercoating from the my red 67 aint gonna happen. Just depends on the cars overall condition I guess.
If it already has a lot of aftermarket on it or getting a complete makeover, why not ?