I believe it came out in late 84-85.
The xr4ti had a detuned svo motor different ecu.
But with the right goodies they can be made a beast.
http://www.rapidogroup.com/
The weak link of those were the t9 tranny if I can remember.
But making one look like a rs500.
http://www.rs-500.com/
I've got an 84 svo so pretty much I've been learning all there is to know about those engines.
If you really want a wild ride take the 2.3l bottom end and put volvo dohc head on there. Lots of work but
This is a svo with that swap.
http://www.ndperformance.com/project..._p2/index.html
The only thing I ask is dont trash it out like you have done with your civic and your girls bmw.
clean it up and drive it. They are fun cars. Just beware when you are in reverse, dont stab the gas pedal. You will boost like a mofo.
If you want some 2.3l sites let me know. I've got a few and found some good stuff dealing with svo's.
I've had mine 10 plus years.