I've only done the swap in my Tacoma and 4Runner, completely plug and play. My 80 is a 92. i've been thru the electrical manual, multiple internet searches, and looking around the 80. Lots of threads on here about the swap. there are 3 radio connectors behind the radio. 2 of those will plug into the back of the Scion unit, the other is no longer used and shouldn't even fit. Also, the amp does need to be unplugged on the passenger side behind the dash speaker. The biggest problem is trimming to fit the oversized faceplate. If it weren't so cold and snowing, I'd pull the 80 dash apart so I could patch a radio in and take some pics. I tend to not spend money without being nearly 100% sure something will work and this swap is a no brainer for me. I might have some time to get out there tomorrow. If so Ill reply again with pics.