67-73 tailpipe on early a-body?

Years ago - 86 or so - I was at Midas having some exhaust work done on my 65 'vert. The tech told me the driver's side tailpipe was all the same (except for the diameter of the 340 tailpipe). He seemed to know what he was talking about but can't vouch for the accuracy of the statement as far as being the same. Never-the-less, I went to my local NAPA and bought a set of 69 L & R 340 tailpipes for future use. Still have them stored away.