Tired of the Mikuni? Don't want to shell out a fortune for a Weber?
Carter BBD from a Chrysler "Super 6" (225cid Slant 6) or Chrysler Small Block 318cid Can be found on virtually every 318 from the 1960's (1967) to 1979. After 79 they started using a Holley 2BBL (emissions carb) that looks almost identical to the Carter BBD and shares the same bolt pattern.
It's the perfect size for a Stock to Modded 2.6L, more tuning options/adjustments.
Mine is from a 1975 Dodge W300 (4x4) ClubCab Wrecker/Towtruck with a 318/NP435 4-Speed/NP203 Transfer Case
The following modifications need to be done to fit it on the 2.6, and the following parts too.
1 Base Plate from a Mikuni (this will be your adapter used to block off the water port in the intake, the EGR and so forth)
1 Carter BBD (from a 318 or a 225 Super-6)
A small Section of 1/4" Flat Steel (to make a Throttle Cable Bracket)
Manual Choke Cable or an Electric Choke Kit for the BBD
Fuel Hose (5/16")
Steel Line & Fitting (5/16")
1 2.6L Carb-Intake Gasket (for the Mikuni)
1 BBD Carb-Intake Gasket (for a 318. Make sure it's the Thick gasket)
Remove the Throttle Blades from the Mikuni Base (leave the rods in place though)
Place a dab of epoxy on the Base, around the rods.
Fill in the Vacuum ports (or cap them)
Ream the Bolt Holes on the BBD inward by 1/8" (the bolt holes are slightly closer together on the Mikuni)
Cap off the PCV Port on the Intake Manifold, since you'll be using the port on the base of the BBD (plus the hose on the intake will interfere with the throttle linkage/arm if it's left in place)
Bolt on the Throttle Arm from the Mikuni, onto the Carter BBD Throttle Arm (the holes are already there to bolt it on )
Replace the Gasket under the Mikuni Base, Set the Base in place, position the Thick gasket for the BBD over the Mikuni Base, Bolt the Carter BBD on backward (like in my picture). Route your Fuel Line & Hose, Route the Throttle Cable around the Oil Cap and back toward the Carb (this will allow you to reuse the stock throttle cable)
Mount your throttle cable bracket to the Stud that sticks up out of the valve cover, it's in the perfect location to match up with the end of the throttle cable casing, where the mounting nuts are. Hook up the Choke, and use whatever Aircleaner (for a 2BBL) that you'd like
In my truck, the clearance is pretty tight, because of the Hydroboost Brakes, there will be more room on a truck with the factory Vacuum Booster & Master Cylinder. With the Hydroboost i had to use a small low-profile 4BBL Aircleaner adapted to fit a 2BBL.
Start it up. You may or may not have to adjust the Metering Rods (under the metal cover on top of the carb) and you may or may not have to adjust the mixture screws (facing the firewall).
It was almost perfect (with the stock 318 settings) for my 2.6L
Cost? I didn't have so much as a penny invested in it I had all the parts on the shelf. But for the average person, probably $50 - 60. Carter BBD's are generally thrown away by the Dodge Crowd when they convert to 4BBL, the rebuild kit is around $15.
I didn't want to buy a Weber, since the 2.6L is only a temporary engine until i finish rebuilding my 4D56 Turbo Diesel. But I will say the difference between the Mikuni & the Carter is night & day. The truck fires up at the tap of a key, idles great (none of that pulsing that most 2.6's do at an idle). Throttle response is instant, it doesn't run rich (like most mikuni's do at an idle), it doesn't load up. It's almost like the BBD was made for the 2.6
All in all, it took me about an hour to install the BBD. That included the time i spent searching the garage for all the parts, and tuning/adjusting it too.