[The cap'n]

You can use the case, but you'll need to change the crank and rods, as well as use the appropriate pistons (pin height is different). You can open up the heads for larger cylinders if necessary. 1.8 heads flow differently than 2.0 heads, so you'll make a little less HP. You can keep your FI system, but it may require tweeking to work as a 2.0. In effect, you'll have a bus 2 liter engine. EFI does NOT like camshaft changes! Your $4K budget may not get you there, as head work, just for stock, can easily eat up $2K if you use a good shop. It is foolish not to do so, BTW.

The Cap'n