Have you done any CFM comparisons on this S/C vs what the 6.5 requires?
There was a HMMWV/Marine S/C setup back in the day. Would really help if you could locate that pulley or borrow one to copy.
Quadstar Tuned '94 C1500 ECSB 6.5TD 4l80E. DS4-5068S. Billet 60mm Turbo with external gate, OBDII converted w/ Bluetooth VPW data stream & Edge EAS Competition Data Logging.
Quadstar Tuned '98 K3500 CCLB DRW 6.5TD 4L80E. DS4-5068S. Fully studded 506 with Optimizer heads.