I can say "amen" to that. I had a set of 488 gears for my 64 Sport Fury 383, would replace the 323s to go racing. It didn't seem to matter at all in the quarter mile, made all the difference street light to street light. Mileage was about 15mpg highway with the 323s, never tried to drive any distance with 488s as I could watch the fuel gauge move. /Butch/ Ferndale, WA -----Original Message----- From: Dan McCormack [mailto:mcwheels@xxxxxxxxxxxxxx] Sent: Monday, September 10, 2007 8:06 AM To: 1962to1965mopars@xxxxxxxxxx Subject: RE: Git R Done Boy I can't undersatnd why some of you haven't increased your mileage more with a taller gear set. I have a freind of mine with a 66 Satellite convert that has a very nasty stroker 440 in it. When he got the car it had 4.56's in it and almost impossible to drive on the street. He switched over to 3.23's and said that he doubled his gas mileage but it only slowed the car down less than 2 tenths of a second in the 1/8 mile. My 63 Fury convert has a more or less stock 1972 440 in it. It does have 68 hi-po exhaust manifolds, electronic ignition, an Edelbrock RPM intake with a 625 AFB and a K&N filter and top. The tranny is the original 361 with a shift kit and what feels like the original converter. The rear has the origianl 2.76 gears. I was thinking of putting on a bigger carb and installing lower gears but since it runs like a swiss watch, has plenty of power and gets 16 mpg on the highway I've decided not to mess with it. I'm of the "If it ain't broke don't fix it" school. Oh it runs fine on regular pump gas too. The Auto Hobby Digest 8 3/4 article lists the following: Gear ratios available on the 8-3/4" axle through the years include: 2.76, 2.93, 3.23, 3.31, 3.55, 3.73, 3.91, 4.10, 4.56, 4.89, 5.17, 5.57. At one point I was looking for a set of 3.73's for another car I had and was told they are very rare and were mostly used for NASCAR. (You remember NASCAR don't you. It's that organzaion that "used" to race "stock" cars) I still think 3.23's are the best all around ratio for the best of both worlds however. Dan ---- 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! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html. ---- 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! '62 to '65 Mopar Clubhouse Discussion Guidelines: http://www.1962to1965mopar.ornocar.org/mletiq.html.