My KSev also has an AC issue. Remember that wrong shroud I bought? My mechanic said he'd do a chop-up job on it and extend the cover around the fan to make it fit.
Interestingly the one I bought is metal whereas the original shroud was available as a two-piece plastic one. Australians have plenty of these shrouds and they sell them for like $10 each! :speechless-smiley-003:
Read this thread-
http://www.nissanforums.com/b13-91-94-chassis/162634-l-f-ga15ds-sentra-service-manual.html
It appears that the service manual for that particular engine is rare.
I may have some photos of the wrecked NSX (before it was wrecked, of course!) snapped with a camera phone. I'll upload it if I find it.
As for your question, I have no idea!