The 1.59 sixty is a little weak. If you pick your 60 up you will be faster. As for the 850 helping I dont know how much but I can tell you we tried an 800 and an anular 830 on my sons 406 (.030 over 400) Dart and it ran the best with the 750 DP on it. Good luck and nice going. Ron

Last edited by 383man; 08/28/13 12:02 AM.