I mounted mine on the cross member in front of and above the fuel tank (el camino). Because as Joe454 said they like to be near the tank. Then, someone told me that above the tank level is not good because the fuel drains back to the tank. So...
I moved it to the frame rail under the passenger seat. Been driving it a few days and the whine is annoying. Unless it is quieter after I install the carpet, its gonna get a trial back on the fuel tank crossmember.
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Rick Schaefer
72 El Camino
TPI 350/700r4
Aces #00140
TEAM CHEVELLE #00038
NCOA #16197