Most 260zs over here have had the carbs changed to the 240 z carbs and the 289 zx electronic ignition,was standard practice back in the 80 s and 90 s as it was a cheap and tried and trusted upgrade in the 260 Z as for the over riders I think they was mainly for the us market but you could put them on a Uk car,I’ve actually got a pair of front ones that I’ll probably sell .The 260 in question is up for strong money in my opinion as it would have to be absolutely mint plus it’s a dealer trying to offload it by the looks of it posibly on a commision basis so depending how perfect you want it I’d say there is room for a decent bit of negotiation,looks a nice car