Quote:
Originally Posted by mrennie
My memory could be off but I believe GM used a 10-15 PSI switch on late 70 or early 80 trucks for some reason. I bought one for a standby generator project I built in order to monitor oil pressure for automatic shutdown. It was 1/8NPT like typical sensors.
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Thanks for the tip! I did some searching on Napa for late 70's early 80's GMC 1 ton trucks and the closest I could find was 2-7 psi, 1/8 x 27 in. NPT - $18.99. 7 psi is better, but I can't seem to find any GM trucks from that era that have higher psi ratings. Part #: MPE OP6619SB
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* '69 Custom S - 2dr Hardtop Coupe - Rust-free Oregon survivor with all original panels and original trunk floor
* Engine alive and kickin' March 2nd, '06 
* RA-IV 'spec' 400 (.060-over = 410ci), balanced, Comp Cams #9794041, #16 heads (72cc converted to large valve) with 1.65 Harland Sharp Rollers
* QuadraJet #7042210, HEI, Hurst V-Gate, FlowTech Headers, X-Pipe with dumps, Flowmasters, TH-350, 3.90 Posi
* Best ET: 14.06 - Bandimere Speedway, CO. @ 5,800+'
Last edited by tremo; 04-10-2025 at 09:06 PM.
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