63 Dodge Dart, now let me see;)
Well you can always move the front of the leaf up to the top hole .
2.47 : 1 you won't need a tall tire , you'll be in overdrive without a O/D gear .
If you stick with the /6 use a 2 1/4 " exhaust to a muffler with a bit of back pressure and a 2 1/4 tail pipe .
It will knock of a bit of off the line torque but make up for it at freeway speeds .
Oh here's a picture of the Lower ball joints if you want them .