318 4-barrels received 360 heads from the factory.
Find TDC and remark the balancer. Set your initial timing where the engine likes it best. Once that's set, check the total timing. You may have to weld up the slots in the distributor to limit the mechanical advance. My 318 with 340 cam has an initial setting of 15 degrees. The MP distributor I have has 20 degrees mechanical advance built in...total of 35 degrees.
