i havent yet did the headswap myself, but i know that you can use the bigger comp cams modular cams (278ah's) which should drastically increase performance. i think the mm&ff got over 400fwhp outa some ported PI heads, these cams, and miscellaneous other things on a stock 98 2v short block. ide research different cams as a next mod, b/c they'd be a great compliment to the better flowing heads.