SalvageV6, this helps me too! Thank you for posting all of the pictures. A tremedous help!
What ohm JBL speakers do you have? I'm putting in door speaker also. I put in rear speakers, going from 4x10 to 6x9 JBLs, but the stock speakers were 10 ohms and the JBLs are rated at 4ohms. Wonder if this will blow up my radio/cassette. The radio is an '88-'89 GM, and all electronic pushbutton controls, not the mechanicals.
Well, if you don't know that's OK. I'm still up in the air with the ohm problem here.
Thanks again for posting those pictures. I'm in need of those plastic supports for the speakers, but can't find any at this time.
Bruce '87 Grand National