Searching for the right 1BBL for a 66 dart 270

My 270 66 dart /6 had a bbs singlebarrel with the twist rod actuator I'm looking for the carb (BAD) now to see if I can see some numbers

ok numbers look like 4098 or 4099 hard to tell really, and it is/was a 225 not a 170 or 198

but with that being said I don't know if it's ever been replaced with the incorrect one