Quote: Given this, and in keeping weight in mind: I'd build a roller 318 with eddy AL heads. Give me 10.5:1 compression Eddy AL heads (reduce pumping losses, relatively small ports will maintain intake velocity, wt loss) Performer or LD4B intake (wt is the key here)
I don't get this combo right here. Eddy heads have the larger 340/360 ports, and 2.02 intake valves. Even with the 318 port size of the LD4B up top, the larger volume further down the line will still kill port velocity. This would seem very counter productive to me in trying to make mileage.
302 heads get my vote if you're going to use a 318. If the 273, then use the heads off of that motor. You have to keep velocity up not only in the intake, but all the way into the cylinder.
