I've forgotten what early Pinto frame boss looks like but the hole is not precision as to size or exact location, if one were so inclined they could maybe drill holes in any boss present there. The tools are not precision as well, all they are is small jack to move a-arm on that corner in or out and then hold it in place, you get same effect by barely tightening the a-arm bolts with no tool at all. Not as easy to change settings though but doable. Easier with tools installed to whack a-arm further back for more caster while keeping camber relatively the same. The tool just gets it done faster with more repeatability.
If you were doing these commonly, yeah, buy them.......tho se days are gone though.