Question on gear ratio

[troy.70R/T]

Ok so I am parting out a 67 Coronet I rotated the back tire 1 full turn and the pinion goes around 1-3/4 turn Any idea what gear ratio this is? I was expecting it to have 2:76's Did they make a higher gear than that?

[A383Wing]

2.76, 2.94, 3.23, 3.31, 3.55 were available.....yer fender tag says it came with a 3.23 open diff

[troy.70R/T]

Ok thanks what part of the fender tag decodes that Also can u tell me what engine and carb it would have origionally came with. The guy I bought it from said it used to have a 4 barrel on it but he put the 2 barrel on it to save gas.

[troy.70R/T]

just wondering if it is a good 383 or a not so good one. I think it should have closed chamber heads

[A383Wing]

yea...it will have probably 516 heads...closed chamber, but small exhaust valve....still a decent engine....got the same in my Chargers

the code on tag says it came with a 4bbl carb...it's the "62" in the lower row....the trans would be auto...which is the "5" next to it....the rear end ratio is the "4" under the "AX" code...3.23 ratio

[troy.70R/T]

Thanks a bunch A383wing. 

[John_Kunkel]

With an open differential you need to turn the tire TWO complete revolutions while counting the pinion revolutions. In your case 1 3/4 equals 3 1/2 so it's likely a 3.55.

[troy.70R/T]

Thanks John I did read another post that you replied to and figured that out. I will double check it tomorrow because my Fender tag says they are 3:23's but I hope they do turn out to be 3:55's