There was a carb with venturi sizes 21 - 23 fitted to 1600 pinto sierra's, but the identity on the carb base would be 28/30 DFTH.
Also a 21 - 23 fitted to 1400 cvh fiesta, 28/30 DFTM, a 21 - 23 fitted to 1600 cvh fiesta, escort, orion, which was a 28/32 TLDM.
So you have a choice, need car year, model, auto/manual and lastly whether cat or not ?
Then I can tell you what you need yo know most likely(99%), but the above carbs are VERY different.
tabetha