Caps aren't necessary on every word. It's hard to read that.
Type R pistons will not raise your compression to 13:1, only to about ~10.5... can't recall the exact compression ratio, but it's only in the 10s; certainly not 13s. It's perfectly safe to run pump gas with the itr pistons.
You've got an engine that will need to be refreshed soon... new seals, bearings, rings, a valve job... I'd just rebuild that, and put some aftermarket forged pistons
in the block.
It all depends on what you want. Cheap, fast, or reliable: you can have 2 out of three.
Quiestions to be asked:
1)What do you want to do with the car? What will you normally be doing with this car?
2)How much are you willing to spend REALISTICALLY?
3)Where do you live? This will give us an idea of how to help you along in the easiest possible way with dealing with the authorities; very applicable to californians.
4)How much do you already know about cars, specifically, YOUR car? I know my DA pretty much inside and out, so almost any questions related to it in its stock form, I can help you out with just about anything.