I’ve been thinking about replacing my gas tank ever since I got the poly tank last summer, and I’m making plans to gather the tools I’ll need to swap it out this spring:
The tank
A new sending unit
A pair of new J-hooks
A pair of new tank straps (although, for $24/ea, mine may still be usable)
Caps of some kind to cap off the evap outlets on my tank
Jackstands to hold the tank up as I’m pulling the old/installing the new
A professional siphon for emptying the remaining gas
A quick look on the Binder Planet returned a few good threads with pictures and advice:
Gas tank strap install – with a few nice pictures and advice on which side of the straps to start with (the fronts)
My quest for the correct o-ring to fix my leaking gas tank at the fuel sender – info on O-rings
Gas tank belch, possible fix!! , which talks about poly tanks and using the extra emissions fittings to avoid burps at fillup time.