I've seen A LOT of posts about making HP with a 318-So why is it so ???

Back in the day when TRW was still a name for cams and other engine parts, a friend with a Dart Sport built a 318. He used a TRW copy of the 68 340 cam. Headers, 4bbl and 3.91's. Ran a 13.2 at Cecil Co Dragway.