I replaced mine on my 87 overnighter a few years back. The tank came out whole after removing the access panel above it, without having to cut any fiberglass. It was tight, but I was able to wiggle it out. Once out, it had the OEM tag on it, which was an aluminum mfg company in Perry, FL. I forget the name, but you should be able to find it. If you search this site, you should be able to find more info. I contacted them, and they sent me a drawing to insure it was the same tank. I believe it was around $600 - $700 to purchase and ship. The new tank dropped right in snuggly like the original. I primed the lower half of the tank (I think I ran out doing it) and replaced all hoses while in there. Took some time, but not too bad of a job.