I randomly found this mix just snooping around mixcrate. This mix has that lovely 4-track sound. Highly Recommended.
Skyway Sounds was a legendary DJ crew out of San Jose, CA, and this mix was put together in 1988 by their legendary DJ Jazzy Jim.Download
I found this cassette and transferred it to mp3, so the sound quality isn't great, but the skills more than make up for it.