To be honest with you guys, my truck has a super rooster in it. And the truck my dad has, has a GM V12. He is not into R/C anymore and says I can do whatever with it. I think the V12 might be better but I really like novak the best.
Dustin, if you have a V12 at your finger tips to use, go for it! I like Novak stuff too (3 Dually, 1 Rooster, 1 Super rooster), but I wouldn't think twice about trying something different if given the chance for nothing out of pocket! Wire up the V12 and see how it works for you. Maybe find another racer at your track with a similar combination as yours with the GT7 and see if you can drive that a few laps and get the feel for how it works and then make your decision. Good luck!