Well it's my first mopar motor, I do have experience ( 30yrs in the field ) but a lot more familiar with Chevy motors and my last car went 5.1 in the 1/8. I know all the fundamentals are the same but you guys all been there and done that with mopars. I just wanted to build something that can be driven on the streets from time to time. As far as the 4500 I was going to do the 4150 but felt the cfm would be maxing out but would be better for a daily driver. Andy why would you ditch the girdle setup ?