Smokin 1000HP Twin Turbo Club
Join Date: Oct 2009
Location: Bethesda MD
I've seen the 6 rib issue come up, but I don't have enough knowledge with that to give you a meaningful answer. I'd call A&A and discuss it with them. They'll know which head unit and pulley sizes you are using.
If you need to switch to 8 rib, then during your motor swap is the time to do it since the blower will be out and the crank pulley will be off. Very little marginal labor cost compared with discovering you have problems and need to do it after the car is back together. On that basis, I'd certainly look at the cost of doing it now. Besides, if you get bored in a year and want a bigger head unit, you'll almost certainly need to switch.
2008 Atomic Orange Coupe 3LT, CC3, Z51 M6
LG Pros with cats, Vararam, 160 T-stat, DTE 3.90s, Elite tunnel plate, catch can, LG Wheels with 275 / 325 Invos, MGW Shifter, EPS 226/230 115 cam, HPT. Pfadt JOC suspension, Peak ported TB & IM.
Gone but not forgotten:
2002 Camaro SS Droptop. cam, gears, etc.
11 sec 99 Z28 Vert, RIP.