[SCOTI]

If your not keenly 'schooled' in suspension theory & the impacts of loading/un-loading & set-up of the suspension, a 'kit' from one source that's designed w/your goal in mind would help consideribly (ART's Street Challenge stuff or something similar). Then it's just a matter of tuning a system vs. a sum of various parts that may or may not want to work together.

Check out stock car products for all kinds of good stuff that can be adapted to these trucks if the kit approach is not for you. Another option (which also can shave some weight) is Porterbuilts C4 Dropmember. Better geometry & easy to adapt bigger brakes.

As mentioned weight control & distribution will yeild big benefits & the importance of sticky tires can't be stressed enough. No 'posing' if you're lookin' to run a decent number.