Alright, Who are the real Zappa know-it-alls?

I have a old cassette tape that I acquired from my father a little while back, its an old cassette that is labelled 1971 in pen on one side, and "From Grandma - To Barry" (my uncle) on the other. One side has a couple songs off of The Wall, and the other side has some killer Zappa and the Mothers tunes.

Its pretty much all instrumental with the occasional vocal parts by the Mothers, and INTENCE zappa solo's. So im going to upload it to my computer today and give you guys a listen and maybe somebody can help me out to what it actually is. :2thumbsup: