Re: Gas tank replacement tips?
Make sure the tank is as empty as possible. Yes, my skid plate bolts were rusted badly but air tools finally broke them loose. Try to disconnect as many of the lines as possible before lowering the tank, or lower it very carefully until you can get to them. I unknowlingly left mine attached and some kinked when I brought the tank all the way down.
Most people replace w/poly tanks but some of the manufacturers are shoddy. When I need to replace mine I'm going w/a 45gal from Northwest Metal Products, but a custom skid plate will be necessary. If you get a new metal tank paint the bottom of it and inside of the skid plate w/some sort of bedliner like Durabak, should stop future rust problems. Or if you want to get creative you can anchor the tank w/universal straps and then use spacers on the skid plate bolts to lower the plate an inch or so from the tank, this will also prevent most rust problems. These are just a few ideas.