In the far recesses of my mind I remember somewhere that it will raise your compression from somewhere in the realm between 1 to 2 points. That means if you are making a pathetic 8:1 compression with the stock pistons, you will be getting someplace between 9:1 to 10:1 compression, which is really ideal for the street and pump gas. Hopefully someone who knows for sure will chime in to make sure I am not leading you astray.
I think the question you raise about "will the stck dish work with these heads" is asking about valve to piston clearance? Yes? If so, that has more to do with the lift of your cam then anything else. Under .500 inches and you should be ok. If your heads are properly setup, you'll be fine over that. Again, hopefully a truly educated person will chime in. If the question does not ask about that, then the simple answer is 'yes' they will work fine.
Davy