I am so tired of people saying that a 13 carb on a 12 intake is the same as a 12. i switched and it's just not true. The 13 is better. Not vastly, and yes having a matching intake would be better. But with a pipe and a Malossi Variator, I saw an improvement by getting the 13.
dccracing...45? on a stock TFR. I'd be surprised.