Tom lowe's 270 cam? As in the "Mid range" cam on his sight? Any how...those are good numbers....I'll be at 9:5:1 on mine so it'll be making 285 hp with the big carb...390 is small for a hopped up 292. lol I'm going with a 625 cfm demond carb made specifically for the 292 with a cam duration of 218 @ .050...gonna see how that does.