What kind of boat? Horsepower? Your intended usage?
It's quite a bit involved and pricey.
Also, what is your current engine mounting system? Shoe & ride plate?
Reason I ask is, usually we don't do JUST a setback. It opens the proverbial can-o-worms.
Moving the pump back necessitates new transom plates or a modified transom adapter.
The keel in front of the intake needs glassed in.
You will need a longer drive line and/or it would be a good time to install a Jet-A-Away.
The relocated pump can play havoc with drive line angle. Sometimes you get lucky because a longer drive shaft can have minimal effect on angle or it can just come out all wrong, forcing moving the engine.
Hope I didn't scare you away...
