'65 273 Commando AFB Choke Help Plz

The ebay add is incorrect. They are pulling the number off the round rod cover? Look at the one in the link I posted. On a 273 the choke well is flush with the carb mounting pad, so the top plate must be flat. That one looks like it is for earlier engines, 318? 361?, 383? I'll try to get the right numbers for the 273 AFBs.