Yes but the ratios are still 2.45-1.45-1.00; so about the best rpm reduction you can get will be 2 to 4% depending on cruise rpm and power required to push your vehicle thru the air. With 4.10s, Ima thinking closer to 2%, on account of the rpm.
BTW;
I wouldn't recommend the 3+1, A833; the od gear has only about 18/20 teeth on it and is, in my experience, easily shattered. Even my stock long-block 1973 smoggerteen blew one up when I put a lil too much power into it. My 367 blew two more up. That overdrive is strictly for cruising in; it will not survive any shock-loading.
