7 1/4 to 8 1/4 swap

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TF360

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74 225 Duster- Could I swap my 7 1/4 out to the 8 1/4 Rear without any issues or is the Drive Shaft length and Joint different? Thanks for any help
 
Yup, driveshaft needs to be shortened ~1", axle tubes are larger diameter so you'll need different shock plates and U bolts.
 
Garrett Ellison said:
I’m doing the same deal, is the 1 inch pretty standard for that?
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Yes, but nothing beats measuring just to make sure. When I did mine, I had a spare driveshaft from a car with an 8.75- it fit perfectly, so I didn't have to have one cut. It was a little over 1" shorter (tape measure, so take it with a grain of salt- could be 1, 1 1/8, 1 1/2, etc.).
This thread seems to agree on 1 1/4- 1 5/8...
7.25" to 8.25" driveshaft? | For A Bodies Only Mopar Forum
 
Yes, thank you! And it may take closer the same length as stock once I put the spring stacks together and set the pinion angle.
 
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