Different Mike, but I'll take an initial stab....fWIW, I've been pretty happy with the Cusco RS 1.5 I have in the BSP car, but it took some finangling to get right. At least with the 350z, we have all had to modify the Kinetix arms (thinner jam nuts and grinding down the thread portion of the A-arm to get enough camber). Even at my ride height, I got more camber out of offset bushings than the Kinetix arms as they were shipped. You can get the rear spring perches from BC, Stance, Megan, etc for not much money. I have used the Megan for 3-4 years now without issue (and so has Peters in STR/STU). You can tune throttle latency and saturation with UPREV. Can't comment on the bushings for a 370, but the compression rod and front lower control arm bushings are a once a year replacement if you use stock on a 350z.
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