Info request: 7.25 gear ratio

[ClarkDart70]

Guys, I cannot find this info anywhere. Anyone know what the gear ratio is on a 1970 Dodge Dart Custom 2 door with 318 2BBl and 904 automatic?
I'm looking to buy a 8 3/4 off of a forum member, but I don't know what the gear ratio comparison is between what I have and what I am looking to buy off of him.

Thanks,
Clark

 

[srduster340]

You will only need to swap the speedometer gear at the transmission to compensate for the difference in ratios. They have to match tire size too. I think there is a formula on Yearone's website. Not sure though.

 

[ClarkDart70]

Thanks. I am looking to buy a 8 3/4 with a 3.23 ratio and was curious how much lower this is than what I have stock in my 7.25 currently.

 

[74DartSwinger360]

You will only need to swap the speedometer gear at the transmission to compensate for the difference in ratios. They have to match tire size too. I think there is a formula on Yearone's website. Not sure though.

Do you have the link?