360 build, hp and compression thoughts!

I'm confused, you rebuild the motor and after finishing the rebuild you want to know what your compression ratio is??? This is usually calculated before you start building...I mean, not all blocks have the exact same deck height...just buying a set of KB107 pistons does not mean you will be at zero deck, or have a specific compression ratio...you have to take measurements, some of which can't be done now that the engine is assembled. We can all guesstimate a ball park figure, but that's about it.

Horsepower is a little easier at this point. Take it to a drag strip and run it. Knowing the cars weight and MPH through the 1/4 mile will tell the story (or you can chassis dyno it).