If you plan on racing east coast woods stuff, I'd almost say 120 is gonna be longer then you want. Healy's new car is a 116 wheelbase and the miller chassis cars tend to be 113-116 in east coast trim. I doubt you see many 120+ cars unless its in the desert. Long rigs that dont turn well tend to get hung up in the trees pretty bad.
Ok I'll definitely shorten it up a couple inches and try to stay at 120. You're the second suggestion I got to bring it down to 120".
I will be racing on the U4 East series the majority of the time but my goal is to make it to KOH.