72mph@3000rpm with .80OD. 72mph@2750 with .73OD.

so than i'm thinking the NV4500's over drive is way too steep. . .

6,000LB's of truck moving 72mph on 19.5's with an engine thats out of torque at 2,000rpm and don't really have any horse power till 3200 rpm won't it Dog out ? so wouldn't a .80 or a .85 be better ?


1962 GMC K3000, GMC-379 V6.