I bought the boat with the boxes/drives and blown up motors with the Prochargers on them. You would have to search or start a thread about before and after with the boxes. I know my boat handles great with them.

The boxes add about 5 mph on a 353. Add from what I was told make the boat handle better too.

I demoed a 99 with no boxes and 502's yesterday - the nose flew pretty low in rough water for my taste - do the boxes bring the bow up any?

Lake Effect what year was your formula when you took the weights? The consensus is no weight difference thru the years?