Shock plates need to be swapped out

[cudaman70]

Can I use shock plates from my old rear which was a 7 1/4 to use on my 8 3/4 rear and anything else that I missed I'm new to this thanks

 

[burntorange70]

No. 7 1/4 uses different plates. 8 1/4 8 3/4 and 9 3/4 all use the same plates. Only other thing I can think of is the driveshaft length. May have to shorten it a little.

 

[Big Jim]

May have to use adapter u-joint if the driveshaft and 3rd member are different-easily available at NAPA or Auto-groan (I think the ssmall u-joint is a "1350" and the bigger one is a "1390".)

 

[Cranky]

The 7260 is the smaller joint with the 7290 being the larger one for the 8 3/4. The 7 1/4 rear usually used the 7260. The 1300 series was use on the Imperials and is a constant velocity setup. The 1350 is larger than the 7200 series joints....

 

[Big Jim]

Thanks for the correction, Cranky! Lotsa extra stuff floating around the gray matter lately, sometimes need a little help keeping it all straight.