AE92 engine

[Ivan141]

If you hammer or weld a box in the firewall you can simply keep the distributor in the original position on a 20v, then it's just a case of rerouting the engine loom that comes with the 20v and connecting it to the existing wiring.
I think the biggest expenses that come with a 20v engine are probably going to be the engine + complete loom/ECU and the water pipes.

Besides, there are tons of good write-ups about the swap on the net.

Whatever choice you make, you will need an ae86 exhaust manifold.
If you go for 16v, then get the intake manifold as well, otherwise you can reweld the throttlebody mount to the other side so it points to the front of the car.