Craig, your diagram matches my truck except I have an adjustable valve in the rear line instead of the 10 psi valve. Jerry, your suggestion about finding a different pressure switch sounds like my preferred option.
Thanks for your help.
Oldbolter
1959 Apache 3800 dually flat bed/dump with 261
1956 3800 dually flat bed/dump with 235
1957 3600 flat bed, 350 engine, 700R4, PS, disc brakes, 14 bolt rear with 4.11 gears
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