Well, if your building a seperate motor, I would advise you to start with a B-series block, they're all very close to the same, and have it re-sleaved to a larger bore diameter. The B20 is just too involving, you need a lot of other stuff to get it to run right, such as: Crank, rods, pistons, water pump, oil pump, extra oil lines, and redo some of the oil passages. With that all said, you can use either a B16 or B18 block, and only have to change the sleeves and pistons, not to mention a much higher reliability factor.

Boreing means to be without some thing to do......ha ha ha, jk
it means to enlarge the diameter of the cylinders, ussulay done by line boring, where the block is placed in a specialy designed machine that almost looks like a drill press, and punches out the sleeves.

As far as stroking goes, you basically change the rod length, in addition to crank angle, this is ussualy not something that I would advise for a street car, as it is very infrequently done correctly, and even when it is, it ussualy causes all sorts of premature wear or other problems.

The ratio of 12:1 is basically the amount of air compression per amount of fuel, the more the air is compressed, the more horse power.

If you're looking for torque, go turbo, if you're looking for HP and a crazy rev range then go all motor. You'd be surprised the amount of torque you can make on a relatively stock, properly built motor. Some pistons, cams, springs and retainers, and you can get a pretty fair amount of power.

In any case, if you want a cool 2.0liter build up, email me, and I'll run one togather for you, but the whole 2 liter, ussualy is a bit over kill.

Later!
Aj