[Hib Halverson]

If drag racing is your thing, disabling the port throttles might make sense.

Otherwise, on 350s and 368s, the car will probably accelerate quicker, if the port throttles are working. This is because at low rpm, with the port throttles open or removed, air velocity is very low and that decreases torque at the low end and the beginning of the mid range. Engines larger than that are, for the most part, immune from the low air port velocity problem.

As for 100LL, do not run leaded fuel if you have cats or oxygen sensors. It renders both useless in short order. Also 100LL doesn't work as well in a high-rpm LT5 as it does in a low rpm aircraft engine. Finally, it greatly decreases spark plug life.

You're much better off mixing 100 unleaded race gas with pump gas.