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They work great. I didn’t get it from LMC. I dont recall now but there’s several similar options out there.
Not as simple and easy as just buying this thing from LMC but cheap and no truck down time if one would fail. 2 simple 4 prong relays from your local parts store,or even 1 simple relay and a diode. 1 relay runs the fuel pump,relay trigger is the original choke wire or an oil pressure switch. Second relay runs the fuel pump only in cranking position. Solenoid wire is the trigger. Even simpler is solenoid wire to a diode to fuel pump,again runs pump only in cranking position. The 2nd circuit is necessary to run the pump while the engine is cranking,the diode or 2nd relay is necessary to keep the fuel pump from backfeeding the solenoid and keeping the starter engaged after the engine starts. If a four prong relay fails you are only dead for a few minutes,you can cripple it back up a couple of different ways to get to the parts store to buy another 8.00 relay,not waiting for the mail to send you a new part. Also many oil pressure switches can be used to power your fuel pump,mid 70s Vega is one example. I think they were standard ignition number ps263. Didn't trust my memory,did a little quick research it's a ps64. Here's a wiring dighram for you
