Sorry Doug, I missed this post the first couple of times through...
Tango has given you some awesome advice on parts.
I'll just address your questions.
With two piece scope rails, you run the risk of not getting the scope directly in line with the bore. It's more difficult, especially on a factory stick that was drilled at the factory.
With a one piece ramp, you have a much better chance of getting in line with the bore, but it's not perfect.
The rings will align correctly on a one piece rail and it will at least be in line with each other.
Now, if you take the gun to a gunsmith, they can check the front and back action screw holes to see if they are correctly aligned with the bore of the rifle. If not, they can re-drill them, which we do out of GP to a larger size hole and beefier screw anyways.
Now, you can overcome this by mounting up your rings on a two piece mount and hand lapping the lugs into alignment, and a lot of people do this. It's not uncommon.
Personally, I prefer the one piece base, with 20MOA built in. It's solid, it's rugged and you have a much better chance of getting your scope to zero and stay put right there.
Badger Ord makes AWESOME stuff. I have several of their pieces and they are worth the money. Hardcore CNC machined goods.