Need help with universal joint

[dart6]

I have a H code 70 Dart with the original 8 3/4 diff and driveshaft. Which of these joints would be the correct one 1970 DODGE DART 5.6L 340cid V8 Universal Joint | RockAuto

Thanks

 

[pntastar69]

Measure the cap diameter
U Joint Cap Size

 

[dano]

Most A-Body 4 speed cars got large u joints, Autos got Small, but measure to be sure as you never know what happened on the assembly line or over the last 50 Years by previous owners.

 

[dart6]

Measure the cap diameter
U Joint Cap Size

will do