Mopar 8 3/4 Rear End (A-Body) - Questions & Help....
Man there's a lot of questionable info in this thread...
You need to order Big bolt pattern axles with green bearings
He may not, if he has a /6 drum front car he already has the 5x4 SBP. And the tapered axle bearings will work fine too.
He says he has a 360/904, but if that was the original engine it would also have a 8.25" in the car.
Thanks for the help.
Seller also mention "small bolt pattern"? is that 5 on 4 vs 5 on 4 1/2 ????
Yup, SBP is 5x4", BBP is 5x4.5"
What engine was your car originally? Are you positive you have a 7.25"? As I mentioned, if the 360 was original you should have an 8.25".
Yes, 8 3/4 a body axles were only 4" bolt pattern from the factory...
In 73 they switched to 4 1/2" bolt pattern for a bodies...
In '73 all of the front disk cars went 5x4.5". And all the v8's got front disks. But /6 cars still came standard with drums, and the drums stayed SBP. So '73-December '75 a /6 4 wheel drum car was still SBP. January '76 everything went front disk and BBP.
Price is about right. If you have time you might be able to find BBP stock axles and brakes. (Assuming your 74 has BBP)
Something to look for is crush where the U bolts go over the axel tube, scoring from the knerling of the OEM u bolts not an issue.
It look really clean.
No such thing as a stock BBP axle for an A-body 8 3/4.
The only difference would be the backing plates off the 7-1/4 don't work on the 8-3/4, 4-bolt on a 7-1/4 and 5-bolt on an 8-3/4...
The backing plates from a BBP 7.25 will work just fine on an 8 3/4 with BBP axles. All of the BBP backing plates are interchangeable, doesn't matter if they came from a 7.25", an 8.25", an 8 3/4 or even a Dana 60.
Many of the later BBP 7.25" 10x2.5" drum backing plates have 5 holes (and use 4 on the 7.25"). If for some reason the BBP 7.25" drum backing plate doesn't have the 5th hole already drilled, just drill it. It's literally the only difference.
