1:1 Std. rotation (left) is correct for this boat with 300+hp , the trans mount will line right up where the old one was. We did use the ZF case because of the weight savings over the B/W. The front mounts however will be set up for the GM stance, Ford is different and will require front mount fabrication, in the old days we ran an aluminum front mounting pad that was about 10" long and either Ford or GM could be mounted, in later years Ford stopped supplying engines to the marine world so we made the mounts for GM only.