Sounds like fun we actually worked with Darton to build the sleeve .I was not aware of any performance part being available.You are adding the larger injectors how do you plan on gaining the air flow.The intake is plastic you probobly can't do much with that but maybe a larger TB .You could have some one flow the intake and heads and just see how much it can flow.I would guess some where in the 200cfm range.Good luck
