Dual Tanks on a 88 b2200 cab plus

Doing a dual tank tank setup on my truck. I live in NC but make frequest trips to south florida and upstate ny couple times a year and ive never heard of anyone doing this so i figured why not. Donor parts from a 1989 f150 with dual tanks. the rear tank behind the axle is usually a 17 gallon, some as big as 39 (factory option) or little as 12 i think. I got the 17 gallon. electric in tank pump is needed on both tanks as the selector valve works off of pressure. the tank pictures are different as im not sure how i want to mount it yet. either one of those. im thinking long ways due to exhaust clearance and right side leaf spring shackle clearance. the valve works off pressure with the dash switch on either tank. if the switch is on the front tank, the valve will sense pressure and move the valve body accordingly. move the switch to tank 2 it moves it back and blocks off the opposite tank. the switch works the gauge as well. enjoy!