Wish there were more video with that 280h cam.the 318 in this video is an almost exact of the mopar muscle partsbook ,318 build 400hp.id like a better video to c how it idles.hard to tell in this video.mean318 build is simular also.
A 280 Comp Magnum ,is a bit feisty in a 318. Get the compression up to a real 9-10 to 1,run about a 3200-3500 converter. (Know your gears ,already). Worked 302 heads,help here.