Please help with cam selection

FWIW.... your pistons sit about .050" in the hole with a stock deck... so not zero-decked (unless you had the block decked). If that is correct then your static CR is going to be in the 9.0 range with the 63 cc chambers (as said in post #24), so no worries over needing high octane fuel.

If you are going to do mostly cruising, then the game changes to a smaller cam than many that have been suggested. For example, the cam suggested in post #3 will drop the dynamic CR to 6.7, which is like a stock 318. Not gonna be spunky at all in everyday cruising in the lower RPM ranges.

I'd be heading to something like RF posted in post #24 (probably a bit smaller on the cam is my preference), but looking for either 1.6 rockers or a faster ramp cam like some of the Howards cams. My son's 340 has the OP's heads, a 10:1 static CR, 3.55's, 2200 stall, conservative 218 @.050" cam, with 1.6 rockers to boost the lift to duration ratio and keep the lower RPM torque up, with an LSA at 112 to help mileage and keep the torque better down low. It is an engine set up for amuch wider RPM range, for flexible use.

The larger heads help the higher RPM's and the smaller cam keeps the low RPM end strong. Post #20 is pointing to this matter.... get the breathing in there, then let the cam and compression set the lower RPM range. Big breathing does not mean a dead low RPM range. IMHO people get too concerned over on velocity and port volume; a wide RPM range engine for flexible use is a lot more than focusing on the main torque band.