Yup platic, or polyethelyne, gas taks are the way to go. I'm on my third and final tank thanks to them. I've had it for 3 years now and everything is still good. www.4wd.com
'84 CJ-7, 6" lift, 33" BFG's, I6, .030 Over, Comp Cam, 400cfm Weber, K&N, T-18, 4 Core, Snorkel, D60 Detroit, Custom CV Driveshaft, 1350 U-Joints, D30 True Trac, Alloy shafts, S.R.S. w/ buggy springs, Custom Folding Shackles and Spring Hinges, Custum Tire Rack, Designed On Board Air, Optima's. Sneaky Jeep Owner #3.