I am keeping CIS on my 87 930, but I will ramp things up a bit. It has a K27 and a bigger intercooler is in route. I am considering a cam upgrade, either SC's or 964s. A local 'expert' recommends the 964s over the SC's - any other good choices out there? Also, with the 964, did these come with the cam drive already on the driver's side?
87 930 slant