Uncalled for, Richard. Let it roll if someone tells you to search. You look better in the end than if you retort and respond the way you did.
The 91 and 95 models are pretty much the same car, just different year, so you should be fine in using the ignitor.
Nissan ignitors are pretty much identical throughout the product lines, they just change in size, cooling style, shock resistance, and number of pathways. They all do the same basic job: prevent overcharged backfeed from frying the ECU.
you will not need to retune your ECU because you used a particular ignitor. However, I do recommend finding the correct to year service manual, so you can match pinouts when you wire the ignitor in. The Q45 manual should be available at
http://www.nicoclub.com/FSM