hey chevy lover- i looked around for a good while only coming up with stainless steel tanks for $400-$600.
i finally got a 68 or 69 F*&d mustang 18 gal.tank from a OEM supplier on the internet for around $160 plus $40 or so for a sending unit. i sealed it and painted it.
i doubled up 16 gauge sheetmetal a fabbed up a skid plate/ resting spot for my airbagged suspension. I used angle iron to string it across the rear frame. i plan on using either a hidden hitch or strengthening up the rear of the frame just in case of a rear hit.
i am hotrodding and not using the original gauges because the sending unit will obviously not work because of the resistance differences.
i have not put the bed back on yet so i don't know how i am going to put the filler. i am hoping for a hidden behind the tag filler but i think i could also go in the bed fill.
hope i answered any and all ?'s
benzdoc