Mate the car these originally came off was sold as a yz10/91 , at the time i had no idea what the difference was, now i am building a picture, it had drescher front arms..may have had alloy bulkheads...still trying to work out the difference, i think they arent as shiny and are heavier? Had a yz10 chassis so standard pulleys and belts but everything else seemed 91 ish...i will put a pic up of what i have now as i have modified it alot to make it a 91 but really omitted some parts as i didnt have the or didnt want them..ie 2mm setup ... Anyway if u dont mind i will plonk pic here and have people pic it to pieces...

...i used yr4 bulheads too as i didnt have a alloy front bulkhead and i dont mind them considering i just noticed one of my magnesium ones snapped on one of my other cars..! explains why the steering was fairly erratic...
I do like your car though and if its a 92 then yippee all the better for you...! Now u can find a 91'. One of the guys here had/has one for sale...