1971 198 slant six Carb

The original carb for a '71 198 is a Carter BBS 4955s (with manual transmission) or 4956s (with automatic), like the one shown in Johnny71Dusty's pics. One of the best BBS configurations ever put out; I used to pounce on these when I could find them. "Remanufactured" carbs done in the last 30 years or so are damn near useless junk. New old stock carbs are the best, but they've grown rare and expensive. Old-stock rebuilds from before that industry went bad are a pretty decent second preference.

With amounts of work ranging from "almost none" to "a few hours", other kinds of carb can be swapped on with good results. I ran the one-year-only (1963 B- and C-body with 225) Bendix Stromberg WA3 on my last '71 Dart; easy swap and it was a really sweet runner; that's my other favourite factory Slant-6 carb. I still have a few of those on shelf, including a NOS unit, if anyone's interested.

The Holley 1920 is well down the list of desirable carbs. It has thoughtless design flaws and inherent problems, especially the '70-'73 units.