Funny you say that, The last time I had it out I actually checked the speed on a GPS and we were doing 82 mph @ 4900 RPM with a lot of boat it the water. And that was with 0 boost actually it was -1 on the gauge. So I am concerned about safety as i start swapping pulleys and making more power. Hence the strut and shaft swap this winter along with moving it up a little to stop the shaft from rubbing. So a drop thru should be the plan you think?