...or some people use an oil pressure cutoff switch. Down side of using the oil pressure cut off switch is that the engine has no/little oil pressure while cranking and therefore no fuel pumped towards the carb. You can "fix" that problem with a push button bypass to the oil pressure cut off switch.
'57 GMC 102, Original 347 V8, HydraMatic, 3.08 rear gear, added A/C, disk front brakes, HEI, AFB carb, '98 Honda Black Currant paint. T-boned and totaled 10/12
'52 GMC 152 Stake Bed, Original 228, SM420, added A/C, HEI, disk front brakes, '67 Chev 3.55 rear gear. Gets used as a real truck.
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