I just recently finished my car project this year its a 331 with some bolt ons i put a rebuilt T5 behind it with a 31 spline full rear end with 4.10's. but my problem is i have stock suspension but lowering springs and those are cut. What i need is to be able to hook up decent i havn't launched the car yet cause im not done with break in and what not. I plan on buying Upper and Lower control arms when i get enough money. Which one would i benifit most buying first when im running a 275 street radial tire? or could i maybe buy sand bags to put in the trunk in the mean time i know adding weight slows the car down but would .2 of a second by added 200 pounds of sand in my trunk benifit??? i dunno what do u guys try?