I think I would disconnect the smog pump, but leave the EGR. The EGR actually lowers combustion temperatures. If the engine is otherwise stock from the addition of a four barrel, I think the EGR has some benefit.
Agreed. EGR aids fuel mileage (lets the motor take in "burnt" air with no oxygen, so there's no leaning out, but still filling the cylinders). Properly functioning, the EGR closes at WOT so there's no impact on full-throttle performance.
