Carb question

[Tropicalcats]

Thanks to this forum and a great search feature I think I know what carb would have come on my car.
I have a 70 Challenger R/T 383 N code 4 barrel LA build car with ECS
So I  need a  Holley 4160/4218 Part number 3418 543 on b'cast 43

My question is what do all the numbers mean? Some our easy Type 4160  number/list 4218 but what is 3418 543 on b'cast 43 mean?
Any help appreciated

[Chryco Psycho]

the 3418 # may be the part number assigned by Mopar , 7 digits around the right series #s for that year .
 the B sheet would only list the last 2 numbers of the part for reference

[cudabob496]

from Holley website:


http://www.holley.com/data/TechService/Technical/Carb%20Numerical%20Listing.pdf

[Tropicalcats]

the 3418 # may be the part number assigned by Mopar , 7 digits around the right series #s for that year .
 the B sheet would only list the last 2 numbers of the part for reference

Neil
I think it was you who put together a great post on what carb for what car. Am I correct to think this Holley should have been on my car?

I know ethanol in the gas has certainly changed in the years since 70 and it's set to increase again next year. What should I be concerned with when I have this carb rebuilt? I plan on driving my car when it done.

[Chryco Psycho]

It definatly was not me , I have never had the reference #s available to me .
 Anything rubber , needle & seats need to be changed to all steel ones , or brass , powervalves , not sure what to replace them with they have to be rubber so I guess they will be swpped more often . It requires 40% more alchohol to make the same poower so expect to have to up jet if it is running a significant % of alcohol , electric fuel pumps will help as the fuel will evaporate off more quickly .

[Tropicalcats]

 

It definatly was not me , I have never had the reference #s available to me .
 Anything rubber , needle & seats need to be changed to all steel ones , or brass , powervalves , not sure what to replace them with they have to be rubber so I guess they will be swpped more often . It requires 40% more alchohol to make the same poower so expect to have to up jet if it is running a significant % of alcohol , electric fuel pumps will help as the fuel will evaporate off more quickly .

Ok now I see it was just in your Tech Shop

http://www.cuda-challenger.com/cc/index.php?topic=51986.30

This is how I found the numbers.about half way down the page