I would say it depends on how far away the track is. I just swapped out the standard 833 in my 64 Polara for an 833OD due to the 3:91's being a PITA! The car screamed, but with gear drive, Flowmasters, and 28" tall tires, the engine was turning 2800 rpm at 55 and it SUCKED on the highway! I avoided the freeeway. With the OD installed 2800 rpm is nearly 80 mph and cruising at 65 now is just about 2200. I lost a lot of power thru the gears, but the car is SO much more enjoyable to drive now. If I was doing the gear swap again, I wouldn't go higher than 3:73's without an overdrive. jeff brown wrote: > > I had 4:56 gears in my Coronet for 6 years, I always drove to and from > the track..... Got used to it. > > > Jeff > > > On 16-Oct-10, at 3:33 PM, Jim Rowland wrote: > > > > > I have purchased a 489 Casing, 8 3/4, that I am going to have > > updated with a Tru Lock. > > > > I have contacted the usual places, Moser, DTS and Hensel's Garage in > > Ohio. Has anyone ever had any work done by Hensel's Garage? He > > states he caters toward Mopars. > > > > I originally going to go with a 3:55/1 for cruising and racing. > > Then I got to thinking that for all that money maybe I ought to have > > it set up for racing, I would drive to the track, like a 3:90 or > > 4:11. Then when going to long trips switch back to the original 3;23. > > > > Any thoughts on my plans? I currently have a warmed over 68 440 TNT > > engine with an automatic. > > > > Jim > > > > 1965 Coronet 500, 440CI > > > > > > ---- > > Please address private mail -- mail of interest to only one person > > -- directly to that person. I.e., send parts/car transactions and > > negotiations as well as other personal messages only to the intended > > recipient, not to the Clubhouse public address. This practice will > > protect your privacy, reduce the total volume of mail and fine tune > > the content signal to Mopar topic. Thanks! > > > > 1962 to 1965 Mopar Clubhouse Discussion Guidelines: > > http://www.1962to1965mopar.ornocar.org/mletiq.html and > > http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.-- > > ^---------------------------------------------------------------- > > This email was sent to: ftp.jeff@xxxxxx > > > > help/unsub.html.ZnRwLmpl > > > > > > > > > > > > > > > > > > > Jeff Adams 64 Polara ---- Please address private mail -- mail of interest to only one person -- directly to that person. I.e., send parts/car transactions and negotiations as well as other personal messages only to the intended recipient, not to the Clubhouse public address. This practice will protect your privacy, reduce the total volume of mail and fine tune the content signal to Mopar topic. Thanks! 1962 to 1965 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html and http://www.1962to1965mopar.ornocar.com/general_disclaimer.html.