Help with dual tank selector valve wiring - 1973-1987 Aug 12, 2015The work has finally begun! I dropped both fuel tanks yesterday and removed all the hoses to measure (roughly 9 feet for both) so I am halfway there. 1976 Chevy 454 big block with factory dual fuel tanks. Has anyone ever replaced the OEM selector valve with one of those Pollak 6 port universal va.. Help diagnosing 87 TBI fuel pump problem Sep 28, 2012Unplug the fuel pump connector by the tank and check for power with a test light while someone turns the key to on. The pink wire should be the fuel pump wire, the tan/white wire is for the sending unit, ground the test light to a good clean section of the frame (grind it shiney to be sure you have a good ground so you get an accurate test).