1991 Red ZR1

[evski]

Hi everybody, I became an owner of 1991 red ZR1 just few weeks ago. The car was sitting in a garage few years and drove about 700 miles since november. There are some works I've already done but still many things needs to be done to make it "great shape".
What I've done:
-sent radio to Doctor Dons (CD and radio didn't work)
-sealed oil leak from header stud (a lot of smoke from the right side of an engine)
-replaced headlight motor

Need to be done:
-backup light switch
-coolant temp getting high when A/C is working.
-poor braking
-iritating smell inside (maybe caused by smoke from headers stud)
-flooring mats

I got a weird instalation in a glovebox with few batteries, switch and cable going inside dashboard. Previous owner doesn't know what it is. anyone have a clue?

Seems like the owner before last install an aux in to CDM but I can't figure out how to make it work.