He's going to need 1967 to 1970, divorced choke.
The 1971 and later units (and the 1970 CA models) will have the top with the large front vent tube even though they were divorced choke thru 1972.
I'll also add although similar the divorced choke on a 1967 is slightly different than 1968-72's and may require minor modifications to get the geometry right.......Cliff