The blue relay is located behind a green relay in the sealed box behind the fuses, driver side firewall.

I am no longer sure that what I thought was the compressor was the compressor. On the passenger side of the vehcile is a device that the belt seems to spin freely on and the front of the pulley is stationary. On the driver side of the car is a device with a standard pulley on it and hoses that appear to go into the ac system. I always thought the front of the pulley on a compressor had a clutch you could see engage and disengage. But now I'm thinking the device on the passenger side of the car is an AIR device and the driver side is the AC. But if that is true, how do I know that the compressor is engaged? And how do I get the black plastic shield covering the compressor off? The tabs don't seem to want to move at all and I *know* if I try it without some guidance I'll end up breaking it.

I don't remember this much trouble when I swapped the intake manifold and carburator on my 75 stingray. But then again, the only complex and unreliable thing to that car was the vacuum system operated equipment.

Here's pic of relay box behind fuse box: