From what i've been reading, re-using oem head bolts = a no no but i've read a few post where they were re-used and turned out okay.

I just recently re-built my engine as well and i had white smoke, Although my car only sat for 1.5 months. Yours sat for a few years? It turned out to just be the condinsation build up in the tank (so it went away eventually). IMo, I think it's just that crap fuel that been sitting in your tank.

Your supposed to put fuel stablalizer in the tank when you let the car sit out of comission for a long time. You can use this stuff called "heet" (found at any parts store) before you start a car sitting for a long time. It supposively gets rid of the water build up and what not.

So imo, i would go ahead get a bottle of "heet" + new fuel and let it idle for a while and see if it goes away. My engine took about 15 miles before it cleared all of the crap out. Good luck.