SS/B Barracuda project

HEADERS?
Well may be it is just me who doesn´t know for sure but... can we settle this once and for all.
I´m talking about the original Hooker Headers.
Are the primary pipes 1 7/8" or 2.0"? I have seen info of both. I have a sense the 2.0" info might be a sloppy measurement of a 1 7/8" tube?
Lengths of the primaries? 36"?
Collector is 3" and 26" long?
Pleas help... can´t sleep at night :)
Thank You.
20170208_124645[1] SSB FB.jpg