Damn Sam, Me and 2 other guys installed those things back in the early / mid 70s when weinstalled the 409 xbar, UCS job.We had a 4'x 8' piece of plywood with styrofoam bales underneath.You know UCS would go to no expense to provide the installers with the best equipment. We quickly learned not to be floating under the dock when the big yachts came by.As I recall, the sea gull crap was the aluminum jacks worst enemy, think we had to replace a few before we left.
