What engine would you build for a Ramcharger?

I like the plan with the marine 360 and the 302 heads for a big heavy Ramcharger. I remember some of your posts about optimizing fuel economy. I wouldn't worry about the large valves in the 302 heads because your best ticket for fuel mileage is going to be a functional EGR and that super restrictive SP2P (let the hate mail fly!). But your going to need a carb with the cruise circuits calibrated for EGR usage, this would actually be a good place for a 318 4 barrel Quadrajet. Use the 360 magnum manifolds, if you have them. If I were going more performance oriented, I'd build the 360 boat motor with a magnum head conversion, but it would be a more expensive route and a lot less practical on your daily drive. I would buy one of the modern high efficiency cam grinds from Lunati, Crower, etc. in the economy build, should be worth a few more MPG.