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8 3/4 rear #2979629 10/29/21 02:54 PM 10/29/21 02:54 PM
Joined: Jan 2003 Posts: 17,861 albany ny 0 05dakota OP I Live Here
05dakota OP I Live Here 0 Joined: Jan 2003 Posts: 17,861 albany ny	im having a c body rear end narrowed to fit my 73 dart to replace the 7 1/4 . the c body rear has no brakes or backing plates . i was told that the large bolt pattern 7 1/4 brakes wont fit the 8 3/4 . what do i need? ted 5549 post on old board

Re: 8 3/4 rear [Re: 05dakota] #2979639 10/29/21 03:32 PM 10/29/21 03:32 PM
Joined: Jan 2003 Posts: 31,050 Oregon A AndyF I Win
AndyF I Win A Joined: Jan 2003 Posts: 31,050 Oregon	Doctor Diff has rear drum assemblies including the backing plate. Either that or find something in a wrecking yard or switch to a disc brake.

Re: 8 3/4 rear [Re: AndyF] #2979643 10/29/21 03:43 PM 10/29/21 03:43 PM
Joined: Dec 2013 Posts: 4,687 Wichita G GY3 master
GY3 master G Joined: Dec 2013 Posts: 4,687 Wichita	Mopar Madness has complete loaded rear drums for $490 on E-bay. Dr. Diff is a bit cheaper. https://www.doctordiff.com/mopar-drum-brake-assembly.html Last edited by GY3; 10/29/21 03:44 PM.

Re: 8 3/4 rear [Re: 05dakota] #2979655 10/29/21 04:29 PM 10/29/21 04:29 PM
Joined: Jan 2003 Posts: 12,160 Benton, IL. D DaveRS23 Special needs idiot
DaveRS23 Special needs idiot D Joined: Jan 2003 Posts: 12,160 Benton, IL.	The 8 3/4 should have 3" axle tubes. Either 8 1/4 or 8 3/4 should work. Should be some of that stuff around for less than $500. You might hit the B, E, and full size for sale section. Master, again and still

Re: 8 3/4 rear [Re: 05dakota] #2979660 10/29/21 04:49 PM 10/29/21 04:49 PM
Joined: Jun 2019 Posts: 744 Almost Heaven B Bob Stinson super stock
Bob Stinson super stock B Joined: Jun 2019 Posts: 744 Almost Heaven	If you buy a brake "kit" be sure it comes with everything you need for the parking brake. I bought one built similar, cut down C-body in an A-body, and brakes were included but didn't include the parking brake arm so I had to take them mostly apart to stick those in. 69 road runner A12 ex-racer 71 Duster w/ a 400 Shiny paint causes stress.

Re: 8 3/4 rear [Re: Bob Stinson] #2979667 10/29/21 05:11 PM 10/29/21 05:11 PM
Joined: Oct 2006 Posts: 7,371 Iowa burdar Owen's Dad
burdar Owen's Dad Joined: Oct 2006 Posts: 7,371 Iowa	Years ago I installed the backing plates/brakes/drums off of a 7-1/4(out of an 82 Cordoba) onto an 8-3/4. They bolted right up...unless my memory is becoming fuzzy.

Re: 8 3/4 rear [Re: burdar] #2979677 10/29/21 06:06 PM 10/29/21 06:06 PM
Joined: Jan 2003 Posts: 20,185 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,185 Park Forest, IL	LBP 10" brakes off a 7-1/4 will bolt right on an 8-3/4. Just make sure your axle bearings are spaced correctly for the LBP brakes. They will also fit an 8-1/4. SBP brakes off a 7-1/4 won't bolt on to either. The wheel bearing is smaller. "Everybody funny, now you funny too."

Re: 8 3/4 rear [Re: slantzilla] #2979679 10/29/21 06:19 PM 10/29/21 06:19 PM
Joined: Jan 2003 Posts: 43,582 Round Lake Beach, Illinoisy Rhinodart Rhinotruck
Rhinodart Rhinotruck Joined: Jan 2003 Posts: 43,582 Round Lake Beach, Illinoisy	I thought 7-1/4 rears have a 4-bolt backing plate while an 8-3/4 has a 5 bolt... The funny thing about science is that if you change one miniscule parameter you change the entire outcome to the way you want it. JB Rhinehart, Realist A-Body's RULE!

Re: 8 3/4 rear [Re: Rhinodart] #2979726 10/29/21 09:12 PM 10/29/21 09:12 PM
Joined: Jan 2003 Posts: 20,185 Park Forest, IL slantzilla Too Many Posts
slantzilla Too Many Posts Joined: Jan 2003 Posts: 20,185 Park Forest, IL	Small bolt pattern do have the 4 bolt retainer. The 73 and up big bolt pattern have the 5 bolt and the bigger axle bearing. "Everybody funny, now you funny too."

Re: 8 3/4 rear [Re: slantzilla] #2979741 10/29/21 09:56 PM 10/29/21 09:56 PM
Joined: Jan 2003 Posts: 8,016 Polson, MT DoctorDiff master
DoctorDiff master Joined: Jan 2003 Posts: 8,016 Polson, MT	10 x 2 1/2" backing plates will bolt to a C-body housing if you grind the top of the housing ends. Contact info

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