Well now that you know the CCs of the heads your getting somewhere. As I mentioned earlier mine didn't match 72 and 70. Cleaned up at 69cc. That gives you room to work with incase you have to shave them to get the compression you need.
I wouldn't run that cam you have now. Not enough lift. Same boat I'm in. Ported W2s are going to want and can use around .600 lift. Don't need a split cam either. Exhaust ports are excellent. Work with a cam grinder to get a flat tappet solid with some lift and not too much duration. Work your heads and something like a cometic gasket you can get the compression needed assuming you want to run pump gas. Get a nice curve in your distributor and tune your carb. Regular Holley 750DP w/ 4 corner idle is easy to tune. Don't forget headers and you should be all set other than the 3.91s you need to install. Good luck!