Re: Vortec engines
You should not need to regear. I think the difference in HP you are looking at is around 25-35 hp- in my opinion that is not enough to justify the cost of regearing, which would be similar to doing a full rebuild of your upper gearcase plus the cost of a new gearset. It would be more cost effective to change the prop, but I would wait and test it with the currect setup first (i.e. test with new engine, same outdrive gears and same prop). If your goal is higher top speed only, and you can already pull the proper rpm at WOT, then maybe look to going up 2" in pitch on the prop.
