So, I will be putting a 2 bbl intake and carter carb on the /6, my question is, are all carter two barrells the same flange size? Or is there a bunch of different flange sizes? I thought about buying one off ebay but the guy says it only fits a 318, I thought a 2 bbl was a 2 bbl. Thanks in advance.

There are two different flange sizes for the 2bbl carbs. The small one was used on 6-cylinders and small-block V8s. The big one was used on big-block V8s. A 318 carb will bolt onto a slant-6 intake, but there'll be choke linkage issues to work around.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

when you say work around, how much are we talking? Fabrication? anything specific?

if dan is nice he will post the link to the carter manuals. one of them in particlular gets into detail the differences betwenn the 318 and /6 version. the way they explain it seems to be that the 318 version is way ineficiant on a slant. but thats just me talkin outta my @55.

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'72 Valiant DD for over a decade-225-Disc brakes, big T-bars, big Sway bars f/r, carter bbd/super six, GM HEI, 2- 12" subs in trunk, 1000w amp...
'77 cherokee cheif widetrack-360-33x12.5 tires-no lift. keeps driveway dry-project/backup DD/mudder

No it'll work, but the choke linkage is meant for the 318's choke thermostat not the odd angle of the super six stat... so he'll have to either:

a) use a manual choke cable
b) find a super six carb and swap the part
c) make a workaround

Also some of the carbs have holes in the throttle plates and this may or may not affect the idle/etc... depending on the engine's build

-D.Idiot

Carter BBD operation and repair manual (pdf)

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一期一会
Too many people who were born on third base actually believe they've hit a triple.