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Discussion Starter #1
Finally done tomorrow. Of course had setbacks. Needed new brake back plates, yoke issue, then drive turned out to be crap. New drive shaft ready tomorrow. So now it's a 9", 31 spline, 11" new drums, posi, 3.50 gears and new 3" drive shaft. Good bye 8 inch 2.79.
Should be awesome.


Chevy runs deep, don't step in Chevy.
 

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Discussion Starter #2
Another unforeseen delay. Driveshaft is garbage, so waiting on a new one.


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Discussion Starter #4
Back on the road. Super sweet. Brakes better and gears made a huge difference. Speedo is now off about 30%, some big gear difference.


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Discussion Starter #6
Everyone uses the 9 inch. Tons of chevy builds use a Ford 9 inch. They're easy to install and bulletproof.


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Discussion Starter #7
Any value in the old 8" setup?


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Any value in the old 8" setup?


Chevy runs deep, don't step in Chevy.

8" fords are still very good. Especially if you have the 67+ unit with the cross braced ## casting, instead of the one with the Flat == casting supports in the case front.

They are plenty strong, can be fitted with a trak-lock diff and have all the same advantages as a 9". I have know some vintage mustang guys who prefer them for a little less rolling resistance.

..But with 2.79 gears, it would need to be upgraded to sell for much more than just core value.
 

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Yeah if you are making ludicrous power going all the way to plaid then 9" is the way to go. Not sure I'll ever make enough where an 8.8" can't get it done tho...





































that's what she said! :eek:
 

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Teeheheheheheeee

Sent from my LG-LS997 using Mustang Evolution mobile app
 

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Yeah if you are making ludicrous power going all the way to plaid then 9" is the way to go. Not sure I'll ever make enough where an 8.8" can't get it done tho...
Plenty of people putting down 700+ HP through a 8.8"

Depending on what your building... There are other advantages to using the 9" platform.

If you get the right version, you can swap one right over to replace an existing 8" housing. Even the brakes can be swapped if you have the right large/or small bearing version.

Swapping an 8.8 into a vintage mustang can be done, but you might have to deal with new spring perches, possible offset pinion position and converting to a disk/disk MC.
 

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Discussion Starter #14
Yeah went with a posi 9. Just wasn't sure if I could get any money for the old 8".


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