brackets and engines

[albacore00]

I'll be re-powering this year on my 23 witch has a bracket and full transom. my current outboard has a 25 inch shaft. I'm thinking of going to a 30 inch shaft to raise the engine up farther out of the water. could I raise the bracket and still use a 25 inch shafted outboard? would it find water to grab? perplexed!