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Ford Rear End/Differential Identification

9481 Views 4 Replies 3 Participants Last post by  AdamCali65, 
A
Hey all, does this seem like an 8 inch Ford rear end to you, because it does to me. Going to upgrade to 3.55 gears and wanted to of course make sure before I bought them. Car was originally a 6 cylinder but now has a 351W and I think the previous owner installed a beefier rear end.

Thanks.

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paul289
See if you can fit a box-end wrench on the lower 3rd member bolt. If it fits, it's an 8". If not, it's a 9"
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Driveway
It would be better if you posted photos of the front of the unit. The bolt pattern and access is the key.

Attached is the 8" on my '68.

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A
Boss Cars, it does taper on the last 12 inches on both sides. I also thought it was an 8" because the top and bottom of the housing are flat where as the 9 inch is round.
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A
I will look at the bolt pattern and such tomorrow and let you guys know
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