I've serviced quite a few bikes of that era. There's a good chance that the spindles and cups are pitted. If so, they're toast, and it would be a shame to buy tools for parts that will probably never go back on the bike. You might be able to get the BB's far enough apart for an inspection with tools you already have on hand, for instance a big crescent wrench on the flats of the fixed cup. Slide the guts out and inspect, then decide what's worth buying. If you buy modern BB's for both bikes, then you only need to buy one tool to rule them all, so you might actually come out ahead.