Carbon canister on top of fuel tank Options

[356drb]

The fuel tank change occurred in April/May 1974. The carbon canister moved off the top of the fuel tank prior to this change. Was it at the end of calendar year 1973 or at the model change in the summer of 1973?

[wonkipop]

i have some stuff i collected back in jan when i got thrown off by the material in the factory workshop manual when i was putting new vacuum lines / fuel lines into engine bay.

at the time i was fairly convinced i had original lines in the car in original layout.
which turned out to be the case.
but i wanted to double check just in case - on the chance that someone during first owners time (first 15 years) with the car might have altered the layout.

first up.
the "diagram layout" that appears in the manual.
this shows the fan bleed is connected next to the small diam vapor line.
the air cleaner line is on the opposite side of the filter.

i believe this is the first configuration that is installed in the cars.
it is also the same as was installed in 911s up to some point in the early 70s.
not sure on cut off date.