What size head pipes and tail pipes used on the factory '68 340?

Tom, we have been through this before. I have a set of NOS tailpipes on my 69 GTS and everything you said above does not concur with what I have. Can you post the factory drawings? When I bought the headpipes and mufflers from you over a decade ago I had to use two reducers to fit the NOS tailpipes on. I had gotten these tailpipes in 1980 from Chrysler with the factory applied part number tags still on them. I am not here to bust balls, but to find out the real dimensions!