o2 sensor

[shock tube]

Hey call me stupid but i can't find it. i have an 87 t-type and i have looked everywhere to find the o2 sensor. Headers, cross pipe, down pipe and all the way back. It does not seem t be present. Help please where is it.

 

[norbs]

Its just under the turbo where the exhaust connects to the manifold, aimed towards the timing cover. About 4 inches from where the turbo bolts on just past the little heat shield