Is there any idea as to how much power I might see from doing this? Thanks guys!

maybe around 20-30 hp???

that would be on the higher end, look for a reasonable 20hp :beerbang:

What to you have. L-98, LT-1. Gain will vary from engine to engine. The more hosepower you start with the harder it is to gain.

Is there any idea as to how much power I might see from doing this? Thanks guys!
Just remember bigger is not always better when it comes to porting. A well done port matching and cleaning up the bowl under the valve is good for 20 HP!
David