Junkie,
As far as the ported and polished throttle body goes, Katech engines told me that there is absolutely no HP gain on a stock engine. With a head and cam package, you can only expect a 5 HP increase with the ported and polished throttle body. They have done extensive dyno testing in their top notch facility. So save your money.
As far as the ported and polished throttle body goes, Katech engines told me that there is absolutely no HP gain on a stock engine. With a head and cam package, you can only expect a 5 HP increase with the ported and polished throttle body. They have done extensive dyno testing in their top notch facility. So save your money.