a lot. you have to cut the bottom out of the boat and install the new intake, re glass in the back. Talk to willow wog, he is thinking about doing it

The hole in the bottom of the boat for the YJ intake is larger than any Berk, so you have to start with a lot of fiberglass work. 

Unless this hull is extra nice or has a long family history I would recommend finding another hull with a Berk already in place.

What crewchief said lol. If its a jacuzzi wj its not that bad of a job. But if its a yj hole its a big job. And then if its a golden eagle dont even think about it it lol.

Anyone know how much Work it is to go from jacuzzi yj to berk pump?

We've done dozens of these type conversion in nearly any imaginable combination (Drakes, Jacs, Vdrives, stern drives to jets) , all involve "grunt" work (grinding/glass work) and some engineering we have also built and modified, of them all the YJ or Panther to Berkeley is the most "challenging" If we can help you with Tech info, or "coaching" or general information  feel free to contact Josh or myself..... Tom

Thanks I will if I decide to do it i think I'm gonna sell the berk tho and buy some seats also does a diverter exist for the yj?

There was a trim made for the YJ (obsolete now) but not a actual Place Diverter a Place diverter can be added after an Energizer , or Xcelerator kits (mixed flow conversion) but not to a stock YJ Tom   

Damn not what i wanted to hear

Not all doom and gloom for your pump! If it's a Golden Eagle YJ, that's an insert pump and then all you need is a sawzall, balls to do the cutting and the berk parts to do a set-back deal. Minimal 'glass work there!

Ray