Cams for 318's

comp XE 268 .477 .480 .224 .230 is way too much for a 318.
go to comps website and get their dyno sheets.You'll see the xe 256 and 262 are better than the xe268 in a warm 350 sbc with Dart heads.
.410 .420 or .429 .444 and maybe .204 .214 would be a good choice for a stock 318, but you didn't want to hear that.