If i was you i would buy a better pipe and cut off ure dumbo ears. that will get you further than a axle and swinger will. i had my first zilla at 335 with stock a arms and swinger with stock axle. believe me when i tell u that its really hard to get under 300# without spending some serious $$$ i know first hand. But seriously them dumbo ears will prob give u a 10th or more and a better pipe will really wake it up. Thats where id be investing. Im not gonna specify a pipe cuz i dont want to cause a pi$$ing match. If u would like ny advice just pm me ill give u my # i dont really get on forums anymore there is too much drama lol. I have weights of everything documented.