i just got a 77 jag 340 from a friend. It has the single carb, but i have a complete dual carb setup for a 77 colt 250 which will most likely bolt up to the spirit 340 motor. Would this be a good idea, i know u get more power, but is there any problems with it just need some opinions. Motor runs great with 115mag 120pto psi. Is it true these sleds will hit 60?