I'm only asking $5 to have these parts shipped. IM me if interested.
I have a stock tuner, tape deck, and amplifier from a 94' full sized Blazer. AFAIK these work perfectly. I pulled them from a full sized Blazer that I used to own when I installed a CD player into it, then I sold the Blazer a year ago. I just recently came across these when I was cleaning out a closet and I have no use for them. They should fit any 1500 series 94' Chevy truck or full sized Blazer. They also fit the 95' 1500 truck and Tahoe/Suburban. I know they don't work in a 96' or newer, but I'm not sure about 93' and older. The tuner is up next to the gauge cluster and the tape deck fits into the center of the dash, with the amplifier mounting up underneith the dash. If you have a truck with this dash I'm sure you'll know what I'm talking about.
I also have a new Napa Gold (Wix) oil filter for that same truck. It's #1036 and I know it fits the 94' SBC 350 that was in my Blazer or any of the 350 v8 trucks from that year. I don't know about any other years.