1970 Carb Question

[JBBQ]

Hello… I am new to FEBO and just posted on the Welcome Wagon.

I was hoping I could get some help determining the correct factory carb for my 1970 Challenger R/T Conv. 4 spd car with no A/C and built in Hamtrack (JS27N0B). It is a numbers matching car with the exception of the carb. I received the car in the late 1990s with a Carter AVS 4966S on it which has run well go the limited miles driven but I would really like to put the original carb back on. After my research, I could only find the Carter BBD 4725 listed for my 383 and then the 4737 for the 440 4spd. Can anyone confirm the correct carb? Thanks. John

 

[EV2RTSE]

For 1970 383s, Carters were only used on the blue engines. JH/BH cars. Orange engine 383s - JS/BS - came with Holleys originally. So for a 383 magnum with a 4-speed you need the one a little further down the list, the Holley 4367.

 

[Deathproofcuda]

I agree with EV2RTSE. Tough carb to find though. Good luck with your search.

 

[JBBQ]

For 1970 383s, Carters were only used on the blue engines. JH/BH cars. Orange engine 383s - JS/BS - came with Holleys originally. So for a 383 magnum with a 4-speed you need the one a little further down the list, the Holley 4367.

Thanks EV2RTSE! I have heard discussions that the Holleys are difficult to run in the heat and Phoenix certainly has been warm this year. . Any experience with the Holley would be appreciated.

 

[JBBQ]

I agree with EV2RTSE. Tough carb to find though. Good luck with your search.

Thank you.

 

[EV2RTSE]

I don't think they're all that great to use day to day, which is likely why your car had a Carter put on in its place. For a good carb to run in the heat you might take a look at a Holley Street Demon.

 

[JBBQ]

Quick follow up questions. ImWhat size Street Demon do you think for the stock 383 magnum? Also, if I can find the original carb which seems “challenging” , what is the difference between ECS and no ECS? The reason I’m asking is it does appear that a 4217 is available. I really appreciate your feedback.

 

[EV2RTSE]

ECS stands for Evaporative Control System, which basically means N95 California Emissions. For a stock 383 the 625cfm Street Demon should be fine. The original Holleys were right around 600 cfm if I'm not mistaken.

 

[JBBQ]

Once again, thank you. Will post pics of both cars later this week.

 

[Deathproofcuda]

Holley 4 Barrel List 4367 MOPAR 383 MT Carburetor for sale online | eBay

Here's a listing for a 4367 on ebay, but the photos indicate that it is a 4368.

 

[JBBQ]

Great. I will contact them.

 

[EV2RTSE]

That's a decent price for a 4368, and the minor differences between the 4368 and 4367 are in the metering block, if I'm not mistaken, so not seen. It should work fine on your car but then again if you're looking for the right # carb for your car then it just isn't it.

Tony's looks to have a true 4367 but of course they tend to be more expensive because they're harder to find.

Carburetors | Tony's Parts