I owned one as well, had mates who had them as well are theres were not real reliable, on top of that the one i bought had been rebuilt by a company with a less than average reputation so i figured i would thrash the crap out if it to get my moneys worth before a rebuild, had if for 12 months, saw 10000rpm many times even took it to easter nats but no matter how hard i thrashed it the sucker wouldnt die, bought my skyline, within 3 months the turbo is screwed.
Would still rather the skyline for reliabillity tho, in fact it was a choice between a s4/5 rx7 or the 33.....
At the end of the day i know the owners of this car for the last 4 years and apart from general servicing it has never missed a beat.