Thorley Headers

I bought a set of Doug Thorley Headers a few years back on E-bag. I need some help identifying if they will work on my Duster.

The car is a 74 Duster 360, floor auto, E-heads, PS and PB.

The headers came in a Doug Thorley box and the flanges have "52" stamped in them. They look very similar to a TTI's except the #3 tube on drivers side is straight down, not curved to the rear of the engine compartment. Checkout the pics below.

Has anyone seen these before? Has anyone used them in an a-body?

Thanks for your help

Attached Images
Author: admin