I had to do this on one of my 91s. The easiest way is to drop the tank. It should be held up by 5 bolts that are likely to be rusty and in need of replacement. Soak them with WD-40 before attempting to remove them. It shouldn't take more than a couple hours, depending on available tools and skill level, but take your time.
My tank straps were also bad, but I didn't get the factory replacement since they were $110. I was broke so I bought some universal tank straps for like $15 and they've been in there for 8 years with no problems.