So I decided to upgrade my stock throttle body. I was under the assumption a stock GT500 throttle body would fit the plenum on my 2.3ltr Whipple Supercharger. I was wrong. So now I’m running a tune from Lund that includes a GT500 throttle body, but I’m running the stock. My tuner says it will just be a little rich but it feels sluggish down low and I can tell its lost power. So here’s my concern, should I have it re-tuned for a stock throttle body, or should I invest $565 for a Ford Racing throttle body? Will it fit the 2.3ltr Whipple for 3V Mustangs, and how much of a power increase should I expect. I think $565 is a little high for minimal gain.