4-Wire O2 Sensor Woes

[350yj]

I just installed a Bosch 13077 3 wire heated 02 sensor ($15) on my long tube headers in my 87 Corvette
http://www.amazon.com/Bosch-13077-Ox.../dp/B0009IK7YW
and I used this harness adapter ($18)
http://www.ebay.com/itm/251738499118
Works great.

I will see if they have these sensors at my local auto parts store and give it a shot.

--
Kris