Help me spend my money, LOL.

Mr. Gasket 1121's. .028 crush and cheaper than the .039's by about half.

http://www.summitracing.com/parts/mrg-1121g

The Weiand 8007 is spot on for that engine. I think you could see a bit more from a 650 carb. A 1970 non HP 440 AVS (4966S) would do well on that engine, without breaking the bank.

Shop around Summit for a cam that has a more modern ramp rate at something right around .500" lift and 230 duration, if you keep those flattops and run a 302 head. I personally think there are better things to be had, like some Engine Quest heads with 1.6 rockers, but that may be money you don't want to spend ATM.

The nice thing about setting up a good set of closed chamber heads is that you could see use out of in the future, with the longer bottom end, when you did do it.