8 1/4" on an Early A, What wheels are you using?

[salinasjoel]

Hey I am getting ready to swap to LBP all the way around. I am putting on an 8 1/4 rear. My understanding that the measurement back plate to back plate is around 2" shorter so 1" each
side then the stock 7 1/4 I have on there now.

What wheels and BS are you guys using?

I currently have 5.5 rallyes on my 7 1/4 rear with 215-60-R14 and I probably only have an inch of room from tire to leaf spring. but have considerably more room (2") front the front of tire to quarter panel.

Thanks guys
Joel

 

[abodyjoe]

i don't think an abody 8 1/4 is 2" narrower then a abody 7 1/4. if anything going big bolt usually widens the rear a hair but no where near 2".

 

[abodyjoe]

when i had my valiant i used to run a standard 15x6 or 15x7 rim and also ran 14x5.5 rallys with no issue.. i know you can go 17x7 with 4.25 nackspace easily on an early abody.

 

[mguner]

My 75 Dart will fit 275-60-15s on 7" Magnum 500s. What ever stock backspace is, I think 4.5". The 15 x 8 won't fit without a spacer or the tires rub the springs.

 

[salinasjoel]

i don't think an abody 8 1/4 is 2" narrower then a abody 7 1/4. if anything going big bolt usually widens the rear a hair but no where near 2".

Good to know, I need to go back and physically measure both rear ends to verify what I read in the book I have.

 

[abodyjoe]

Good to know, I need to go back and physically measure both rear ends to verify what I read in the book I have.

yea measure it up.. i don't think its as much as ya think.. as long as they are both abody rears..

 

[vntned]

Read it and weep!
The 7.25" is 53.2" vs the 8.25" is 51.4".

http://www.moparts.org/Tech/Archive/axle/17.html


I have an Abody 8.25" in my '64 dart. Even with 2" drop leafs from Espo, my 225/50R15s on 15x8 cop car wheels don't rub! Backspacing is 4.5".

 

[salinasjoel]

Read it and weep!
I have an Abody 8.25" in my '64 dart. Even with 2" drop leafs from Espo, my 225/50R15s on 15x8 cop car wheels don't rub! Backspacing is 4.5".

Are you running the same up front?

 

[abodyjoe]

Read it and weep!
The 7.25" is 53.2" vs the 8.25" is 51.4".

http://www.moparts.org/Tech/Archive/axle/17.html


I have an Abody 8.25" in my '64 dart. Even with 2" drop leafs from Espo, my 225/50R15s on 15x8 cop car wheels don't rub! Backspacing is 4.5".

ummmm.. that chart is for a 8 3/4 not a 8 1/4.


plus that chart is known to be wrong..

here are the correct measurements for a 8 3/4 rear.: http://www.moparts.org/Tech/Archive/axle/16.html

 

[salinasjoel]

For what it's worth I just measured my a body 8 1/4 backplate to backplate and came up with 83"

 

[abodyjoe]

83" lmao. something that wide even fit in a lane?

 

[salinasjoel]

Haha fat fingered it 53"

 

[abodyjoe]

Lol

 

[vntned]

Yes, I'm also running 15x8s with 225/50s up front too. That's with PST drop spindles and disk brake conversion.

 

[salinasjoel]

Got a picture? I'm thinking about dropping my65 1"

Yes, I'm also running 15x8s with 225/50s up front too. That's with PST drop spindles and disk brake conversion.

 

[omahamoparguy]

measuring to the backing plate is not accurate because of the differences in the backing plate dimensions. some backing plates had "offset" to account for various brake setups, ie; different width and diameter drums. Note that most 7 1/4 rears had narrow brake shoes and the 8 1/4 had wider brake shoes. I would measure to the axle mounting flange to get a more correct idea of what your dealing with.

 

[vntned]

 

[vntned]

 

[salinasjoel]

I like that!

 

[vntned]

Heres a few I just snapped. Better views.

I've got the adjustable front spring perches currently on the higher position. Probably gonna drop it down and see if I can dial out some of that rake...