318/360 swap questions

Run the widdle cawbbie.
It will be fine for break-in, for cruising, and if you know how to tune it., you can make it go till the rods come out the side.
Obviously a bigger carb will make more ultimate power and more average power, and if you have a M/T with a DP, will smoke the tires from standstill to 80 mph. The smaller carbie is a little nicer to drive on the primaries, around town.