mopar or edelbrock intake?

Sublime in my humble opinion you have to make sure your parts match. Theres alot of guys here who can tell you what parts work good together and what don't. I actually have a performor intake and 600 cfm eddy carb I just took out out of my car. I also have a slightly higher stall for a 904. This is a nice combo. It's better then factory. It should may get you around the 300 hp your looking for. As for the heads I remember reading somewhere that that the later 318 heads, but prior to the magnum, flowed better. Don't worry if I'm wrong someone here will quickly correct me. I personally would also make sure you have good compression befor you put ANY money into your motor.