360 - Rebuild - Information & Opinions Needed

It's easy to overthink things. If the goal is budget build, and cruising/fun then I'd replace the pistons with KB107s and internally balance the thing. If it were me I'd also align hone the mains and square deck the block. Those with a modern hone and wall finish will give you some power and economy. On the heads - have them rebuilt and expect to do exhaust seats and guides, replace the valves, and have the guides and spring seats cut. The valve job is critical. Have a modern 5 angle "cutter" valve job done. That basic blueprinting work will also add power and economy regardless of the cam choice. You don't need aluminum, nor do you need porting. I agree with the "keep it under 220° @ .050" crowd. You don't need a ton of cam. It will be plenty quick and torquey and run good on pump fuel.