Just a bit of engine oil should be fine, is what I've always fog oiled with in the past with no issues. Just get a bit in there and let it sit for a bit so it works itself down around the rings.

If the only thing that crapped out was the fuel pump, she should fire just fine. I assume she's carb'd which means that POS Mikuni is still onboard. That might have some issues with all the bits of rubber and crap in those things, but ya never know til ya try. Think you can still get "rebuild" kits for the Mikuni, will give ya fresh diaphragms and other rubber bits that may have bit the dust over the years...if they have. God help ya, though. I made my Grandfather do mine, he was a GM mechanic trainer for over 40 years and all he did was curse and cuss at that thing. Need a PHD in mid-80's Japanese emissions "tech".

Do make sure you change the oil, if nothing else it'll get fresh oil on the springs, timing chain, etc...