Exhaust for a 1973 Duster 340 (Pics Included)

In answer to the first question:



Curious: What makes you think it's a 340?

I'm not an expert on the matter...or even a slow drip under no pressure at all...but the lack of a vacuum boost on the brakes is one thing that makes me wonder.
I have seen more 340 cars without power brakes, than with them.