Good luck, that swap is a bitch-and-a-half.

There was no such thing as a fuel injected 84 CRX, at least in North America. This means you have to fully convert to 85 Si spec, swapping a lot of crap (fuel lines, pump, gas tank, wiring harness, ECU, etc.).

Then you have to go to HASport and buy lots of custom parts to wedge the B series into the 3G platform (mounts, shift linkage, axles, wiring conversion harness, etc).

If you get all this done, your bank acount will be a few thousand dollars lighter and you will have damn fast car, as the 84 CRX is the lightest body that B-series swap kits are availible for.

Much more info, including my longer posts on this subject, are in the motor swap questions sticky at the top of the page. Any info regarding carburated 84-87 Civics and CRXs will apply to your car.

Note: Carburated cars have no real OBD system. The 85-87 FI system is a primative OBD-0 which I personally call pre-OBD, and the 88-91 cars use a true OBD-0 system though it was not know as such until the implimentation of the OBD-1 requirements in 1991 for 1992 model year cars.