I bought the CPP stock style arms (I got mine from summit too)
http://www.summitracing.com/parts/cl...del/c10-pickup
http://www.summitracing.com/parts/clp-6372scal
When I pulled my suspension apart for the 4/6 drop I found my upper and lower control arm bushings had a fair amount of wiggle. It was expensive, but I didn't have time to strip, clean, and rebuild my stock ones with new bushings (not cheap either.)
They appear to be just as heavy as stock. It was tricky getting the lower shock bolt in, but it's tricky with the factory ones too.