New boat to me. the lowers presently have 1" drop extensions that lower them back down, that are being removed tomorrow. would like to see Wayne or Joe chime in as im sure they've tried every set-up imaginable, but i have 32 bravo props and can only pull 4600 RPM and 80 MPH. Previous owner claimed he lost 8 MPH by adding the spacers, but had a hard time getting on plane as he always had a boat load of people on board. WHAT PROP IS GOING TO BE CORRECT? I would think i should see low to mid 90's when it's right? What RPM range should i be running in?

You should be seeing close to 5,400 RPM WOT. Call the factory as Joe and Wayne do not bird dog this site. Are the 32's labbed or stock?

We have run into issues with planning and slip % putting 2" shorty's on 32 Dominators.
However, in your case, the slip % you have is right on the money at 12. So, bad news is, your probably leaving a couple or few mph on the table not 10.
Most of these boats did and do run in the mid 80's with your power.

Brett