All of this conversation about cams has got me spinning. After a lot of research, my take away is, with a basic 318, changing the cam is a risky thing to do with not very much up-side. It seems like I can cause myself more problems by making a bad choice than any real benefit from an upgraded cam. Also, I just went to my bench and found the casting numbers on the heads....2465315, 1964-65 273 heads! I guess that when the previous owner had the engine rebuilt, they put the original 273 heads on. Is that a problem, does that take me further down a no-win road? The timing chain is sloppy, so adding a double roller timing set seems like a solid plan, after that maybe just put the old girl back together and get on with my restoration. If I want some real "zing in my thing" it seems that different gears might be more useful and give me some of that immediate gratification that I'm looking for. I already have a new performer intake, new long tube headers and an Edelbrock carb. that are going into the car....maybe this is as far as I should go down the rabbit hole. What do you guys think?