The MarkVIII MAF is being used by several folks here, do a search for specifics.
Some were told not to use it but those that have, claim they run a little richer, but also claim that it gave good results on the arse dyno.
I had one I was gonna use, but sold it before I got to try it out. From what i read, I was convinced it was worth it.
I ended up buyng a C&L unit and 42lb injedtors, which precludes the possibility of using a stock MAF.
You can find them in the classifieds, or on ebay regualrly...
Good luck!