commando's vs. eddie rpm's

well, I intend to have a light weight, quick clean and thoroughly bad *** car when I'm done. I want the weight savings of aluminum heads, I want to increase velocity at lower rpm's I want the smaller chambers, with the corresponding increase in compression and the added benifit of being able to run 10.5-11:1 compression on pump gas with no detonation, all in a 318 with a xe275hl street cam! They aren't worthless to me, I had also considered the aluminum magnums. My car is a 68 cuda, and I will have kb 167's in it, forged crank, stock hd rods, 2500 stall, rpm airgap, possibly even efi. I don't think it will be living at 5000+ TOO often, he he, but you take my meaning. I don't want to run large port heads, for my application it would be a waste, I have j heads that run fine. that is why I was pleased to see small port commando's with 60cc chambers. even if I run a 3.59 stroke I would still benifit. I think I want a quality aluminum head, good velocity, smaller chambers, good flow, in my street car. Make sense to you? It does to me, My 318 right now has 8.5-8.8:1, if I'm lucky. Why mill a perfectly good set of j heads down .040-.060 to increase cr when I would be ruining them for my next 340 or 360? Now, I am only speaking for myself, I certainly have my own perspective, and to those with ton's more experience than I, I digress, and with all due respect. I want my cuda to be as frikkin awesome as I can possibly make it, and still be a driver. But not a race car, I live too far from the track to be serious about that.