Small block heads

Thanks for the replys, so do the 340/360 heads have bigger chambers or no? We really want the car to go fast. So who's in favor of the stock heads? Also i've been reading about these eddy heads, i've been around mopars my whole life but never heard of them. Who sells eddy? I may be interested. But ya my buddys car has a lunati cam, hooker headers, edelbrock carb and intake, thats about it. He never decked the block or milled the heads and has stock pistons. about what would his comp. ratio be at roughly? just curious about were he's sitting at right now. Thanks again to everyone. I appriciate it.