Brian,
I think choke jet = start jet. I see 60 as the only option.
Idle jets stamped 30, 35, 40, 45, 50, 55 and 60 only are legal to be used. It is not mandatory that idle jet and idle emulsion tube show the same size.
Idle emulsion tube stamped 30, 35, 40, 45, 50, 55 and 60 are legal to be used.
It is not mandatory that idle emulsion tube and idle jet show the same size.