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When swapping a vortec to a carb is there any wiring that needs to be done for the fuel pump to stay on while running?
probably, why would you go that far back in time?
at least to the 5800 rpm hardwired rev limit of the black box computer.
While I agree with most of the body of that post... I see people throwing this "hardwired" black box RPM limit around a lot. Simply false. The BBP tuned black box in my V6 truck commands WOT shifts at roughly 6300.
Also any EFI system is going to run more efficiently than a carb. The carb may make more power, but at the expense of fuel mileage and drivability unless you're very, very experienced in carb tuning. Even then, good luck.
The vortec platform just isn't conducive to shadetree tinkerers.