Posted by Rob Steller on June 19, 2000 at 11:57:05:
Just found out about this easy upgrade on W-300 with 1 3/8" spline clutches. The original standard 11" clutch disk (Borg and Beck #12559) can be replaced with a 12" disk (B&B # 13363) now NAPA # RCF586, and the pressure plate (B&B # 1433) can be replaced with 12" (B&B #1575) now NAPA # CA1733. The pressure plate is the same on the WM-300, and there should be a matching disk for the 1" spline. On doing cross references of these parts beware that the actual clutch diameter is 11.87", not 12.00"!! Rob