i have 23 dart pro1 heads 215, 205vavles, 4-7 swap 679-643 comp. cam. high rise team g intake. eagle rodes an crank 14.5-1 compression. heads have been worked to the fullest by steve. nascar migul pistons 30 over. 400 stock chevy block 2 bolt main 1050 carb. i have been 5.87 at 114mph. 2560lbs car. can i get anymore out this combo. thanks