Walker Quiet flow mufflers ?

What?? Now I'm not allowed to complain about lackadaisical performance?? If you expect me to be politically correct, it ain't gonna happen!

Here's the catalog section for SuperTurbos. I have the entire Walker Catalog in PDF format if anybody wants it, but the Quiet-Flow is not in there. Maybe because they are newer?
I'm building the system to fit 92 Dakota manifolds. The system will be custom from the manifold back, most likely getting original ends that mate to the manifolds and welded to the downpipe section. Being a Mechanical Engineer, I have been trained to build according to specification. Therefore, I would like to have the specifications for OAL to build the system to the correct length and component placement.
I worked in Headquarters Technical Support for many years in the telecommunications industry. My customers were within the company, but they were customers. It was my job to fix their problem no matter what. If I had to get on a plane with no notification, then that's what I did. Didn't matter what my plans were. I did my job and did it well!
I don't see why it's an imposition to ask a customer support representative for specifications. He gets paid whether he has to find one muffler or one hundred. I'm asking him for the information related to OAL, so how can I give him what I'm asking for? I don't manufacture the mufflers, he does.
BTW, I did respond to his reply and did not receive a return response.