I also heard of the "coating" on gas tanks flaking off and causing trouble. I used nuts and bolts in my tank. Shook them around and after that I bought a quart of metal "Prep and Primer" acid from Home Depot. Sealed all openings in tank and sloshed the acid around. Rinsed it with water and let it set in the sun for a day, in Phoenix summer sun it doesn't take long. I filled it with gas within 3 days and has been great ever since.

'52 Chevy 5 window, it ran when I parked it
'53 Chevy 5 window, running the streets with me.
'55 Massey-Ferguson, tearing up the dirt
'89 Harley FXSTS, suicide clutch
'92 Harley FLSTC, equal time with the '89