273?

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A 8 3/4 rear with a 3:23 would be common. Just depends how it was ordered. Most GT's came with the good rear and the standard 3:23. A 270 model with an optional 273 may have a 7 1/4. The option books are a bit sketchy. They list the
7 1/4 until 1974 but don't list them past 1966 in the option charts. I'm sure there's an expert here that can help you. tmm
 
Mine is a 270 model that has a 273 2 bbl. I debating if I'm going to rebuild my 273 to make it a 4 bbl. or put in a 340. I have a 8 3/4 I want to swap to. Mine other question is will the whole brake setup from my 7 1/4 bolt onto the 8 3/4 housing? The 8 3/4 housing I have has axles with SMP and backing plates.
 
Brakes do not interchange from 7/14 and anything else. So for the swap you need the backing plates, new U bolts, and the shock plates because of the larger diameter U bolts.
 
titanium said:
Mine is a 270 model that has a 273 2 bbl. I debating if I'm going to rebuild my 273 to make it a 4 bbl. or put in a 340. I have a 8 3/4 I want to swap to. Mine other question is will the whole brake setup from my 7 1/4 bolt onto the 8 3/4 housing? The 8 3/4 housing I have has axles with SMP and backing plates.
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If your 7 1/4 has 10 inch brakes then the shoes, wheel cylinders, hardware, and drums will go onto the 8 3/4 10 backing plates. You will need the 8 3/4 parking brake struts. Trust me I did this swap on my 66.
 
chryslerfat said:
If your 7 1/4 has 10 inch brakes then the shoes, wheel cylinders, hardware, and drums will go onto the 8 3/4 10 backing plates. You will need the 8 3/4 parking brake struts. Trust me I did this swap on my 66.
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Going thru my old posts and I'm to the point where I'm going to swap from my 7 1/4 to my new 8 3/4 this weekend. I see that it is mentioned that I will need the 8 3/4 braking struts. Where would I find these if I do need them? Thanks
 
1967 A-Bodies

The 8 3/4" Rear came through with the '3.23 Gear Ratio' as 'standard equipment'.

Options see below,
 
3.55 and 3.91 were optional on 67 B-cuda can not imagine dart was different. But 3.23 was only option with 383
 

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Correct Rocky J.........My error -

I meant to say the '3.23' was the 'only' Gear Ratio available for the 383 Engine.

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titanium said:
Thank you for your help. I thought that it would be one of those hard to find parts.
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The Parking Brake Struts are hard to find. they are not sold (to my knowledge) by parts houses, you will need to find a pair from an 8-3/4 differential (these are the ones with the length-wise 90° angle bend). I had a hard time finding them for mine.
 
Cool, I have seen that just never pulled the trigger on it. Might have to do that nothing better than handy trinket information! Thanks!


69 Cuda 440 said:
Rocky JS,

That is from the 1967 Plymouth Barracuda 'sales brochure specifications'.

Even has the Camshaft Specifications with 'valve spring pressure'.
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O.K. Thats what I was thinking. After reading the post from chryslerfat. So with that being said I did go on ebay and see there are a few for sale. Now I see there are 2 different sizes(not sure if either is what I need). One is for a 11 x 2 1/2 and the other is a for 10 x 2 1/2. All three look different so how do I know the correct parts I would need? Thanks
 
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