I've played with a few different setups on my 511. I've ran both a six pack and a 1050an 4150 carb that's pieced together from a proform 850 street carb. Both setups ran 10.90's on my 4g 69 runner on dot's, through mufflers, and driving to the track. I have the 1050 on an old tm6 I ported. Really runs well, it did take a few tricks to clean up the street manners. It really drives around as good or better than the six pack.