My folks have had 3 used Omni/Horizons. One had over 200,000 miles when they got rid of it, starter was out so Dad just parked on a hill and would coast start it. I raced a 86 Shelby Charger (originally a 2.2 turbo, I put a high output carburated 2.2 out of another 86 charger in it) on a 5/16 dirt circle track, I won 5 features, sold it to a 15 year old kid, and he won 5 features at a 1/2 dirt circle track.
The 2.2s have possibilities, you can take .030 off the deck of the block and make a high output(raises compression to around 10/1. Mopar Performance even had parts for them back in the day, cams, stroker cranks, blower kits, etc. A lot of these parts are hard to find now. The omni/horizons are fairly easy to work on, just pick up a haynes book and a Mopar Performance 2.2 engines book.
I currently am working on a 88 Omni with a 2.2 with a stock crank, 2.5 pistons, custom pistons, ported and polished head, and an aftermarket cam, ported exhaust manifold, weber 38 carb, bypassed computer and an aluminum flywheel.
Having said all this just remember they are 80's economy cars in other words no frills.
