I’ve posted 3 pictures of my car along with registering it. It may take a little while for them to appear.

I would find another muffler shop. I just had my whole exhaust system replaced using an NOS muffler on my 63 F-85 and my man used one pipe from in front of the rear wheel to the muffler. He did several bends matching what the factory did. None of them are close to 90 degrees.