Best suggestion is to carefully remove the throttle shaft from the old Carter YFA and then do the same to the Chinesium one. Install your old throttle shaft into the Chinese carburetor using the Carter screws to attach the Chinese throttle plate. Be sure the plate is properly centered before you tighten them all the way.
Bill AKA "LOBO"
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"Getting old is inevitable, growing up is optional"
Darth Vader 1986 F350 460 converted to MAF/SEFI, E4OD 12X3 1/2 rear brakes, traction loc 3:55 gear, 160 amp 3G alternator
Wife's 2011 Flex Limited
Daily Driver 2009 Flex Limited with factory tow package
Project car 1986 Chrysler LeBaron convertible 2.2L Turbo II, modified A413