I have a 1966 Mustang and I am thinking about putting new gears in it. It has 273 gears right now. And seeing as how I don't drive it on the interstate I was thinking of putting 373's or 411's in it. What do ya'll think.

 

What kind of transmission?

 

4 speed manual transmission

 

I would go with 3.73's, 4.11's wouldn't give you much of a first gear. Hope this helps.