identify rear axle

[jw97neon]

so i just brought my first old mopar. introduced myself in the welcome wagon.. i have been going over my new car trying to learn a few things about it. i have some charts that help you tell what rear end may be in your car. i just purchased a 1965 dart gt. appears to have been a 273 car. have noticed a few changes to it including rear spring hangers. i look at the left side of the diff and i see a big 9. seems to me this is a 489 center section. when i measure the bolt pattern on the wheels i find it to be 5x4 the small bolt pattern. can you installed a 489 center section in a old housing? where would i find the casting numbers on the housing to help identify it.

 

[krazykuda]

Do these help?

View attachment Differential ID.jpg

View attachment rearaxledims.jpg

 

[mopar head]

you have an upgrade, enjoy it...

 

[Bad Sport]

i look at the left side of the diff and i see a big 9. seems to me this is a 489 center section. when i measure the bolt pattern on the wheels i find it to be 5x4 the small bolt pattern. can you installed a 489 center section in a old housing? where would i find the casting numbers on the housing to help identify it.

Sounds like you have an A body 8 3/4 rear.

 

[jw97neon]

that is good. i was hoping to save some money. now time to do the big bolt pattern upgrade.