Tips n tricks for exhaust install

just for comparison to see what the original pipe would look like.
I believe this to be my original driver side exhaust pipe by the looks of my 1967 tire.
I don’t doubt it’s the original.
The muffler looks like it was changed almost looks like a hush-thrush? It’s 18 inches the only marking I found on it is an OT 8 and an arrow foward don’t believe it’s the original muffler but pretty sure orig head pipe.

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