Generally speaking, Jeep parts are expensive; however (and I have not looked), the YF for the Jeep might be an exception. Clifford makes a 4-barrel intake for the 258, and the Jeep folks bought lots of Carter 400 CFM AFB 4-barrels for their 258. We would modify the AFB, adding the off-road Carter fuel valve. Sold a lot of them, and then a gentleman in Europe cleaned my inventory of these.

Jon.

Good carburetion is fuelish hot air
The most expensive carburetor is the wrong one you attempt to modify.
If you truly believe "one size fits all," try walking a mile in your spouse's shoes!
The Carburetor Shop