You need better heads and a better cam. 13 to 1 compression and racerite oval port heads? Even if they are the biggest one's they're marginal for that size engine. A solid roller with a decent set of heads should make a nice difference. Personally I'd keep the t-ram and carbs, maybe upsize to 750's later on. A t-ram is the cheapest way to get 30-50 hp. Plus you get that super responsiveness you just can't get with a single carb.