What motor to go with?

I lost you at the "bore 0.030". That would give you negligible HP increase. It is mainly done to repair worn bores. If you have bad rings, often a hone and re-ring will fix it (cheap), without a re-bore and new pistons ($$). Have you checked compression & blow-by? No need to rebuild a perfectly good motor.

If you want a cruiser, you want a smooth idling engine, with good low-end torque. That means a mild cam, 2-barrel manifold or dual-plane 4-barrel. 2-barrels were designed for that, since the average driver prefers that. To the average driver, when they say "powerful engine", they mean good off the stoplight torque, not max horsepower at high rpm with the engine screaming.