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So, I joined about 6 years ago and have been plugging away at a full restore on my 1971 Nova. I’m getting down to the nitty gritty (finally) now that school is done and my son is 7. I’m 48... been a car nut since about 15, but life gets in the way. I’m sure some can relate.

The question: I’m looking at options for a rear diff on my Nova. I’ve landed on the Ford 9” with 3:55 gears. Engine is a 383 stroker and B&M tranny, @430hp.

First: Ford 9 the way to go? If not, why?

Second: Gear recommendations? I’m not racing, just having fun on the street.

Third: I’d really like to narrow the rear end a little so I can lower 2” and tuck the 255 / 45R17s in a bit. It looks like there’s about an inch of clearance on the inners so it could be done.

Any recommendations? No, I don’t want to mini tub... yet,

Thanks guys!
 

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9” is a good choice based on options. It has pressed on axle bearings which is good in the event of broken axles. As far as strength overall, a factory 8.5 gm rear is fine.
 

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If you aren't going to be racing and doing a lot of launches on sticky tires, Grab an 8.5.

Also, you can fit 275 tires in the rear on with factory width axle and the right offset wheels
 

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1965 2door HT Helena, GA 31037
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What is that weird  in Novish's text?
 
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