i don't really kow how much difference it makes but i am about 215 and race a upringht mini. i would think that they would be pretty similar. i run about 50 heavier on the rr and 25 on the lr then the smaller driver that was driving my car also shocks make a huge difference to me. i run a 4 on the rr and a 4/2 tie down lr.. also with the roll center being changed i always felt like i was going to roll over any time so i run a 4/1 on the rf also. keep in mind everyone drives different. so this may not help a bit. but then again it might. if i had to choose i would say shocks over bars would make the most difference. what size tires do you run? i would never think to run over 10 psi in either rr or lr i start out around 9 rr and 6 lr then if it really slick go down 8rr 4-5 in lr . block at 3r and 2 in the front. and that should get you close. please don't hate me if it don't work. but this is my setup and it does ok for me