An accurate 8 3/4" rear axle width list

Spline? Axle splines? Pretty sure all the common year non race are the same. I forget the count to tell ya the truth.

As for gears it all depends what you are doing. Stock 318 and just a driver I'd say 2:76-2:94.

More then stock 318 and just around town maybe a 3:23-3:55. All depends on your combo and intended use.