Taller Tires Needed

33IMP said
Yep. He might have TOLD you it had 3.73s, cause he might have been afraid you wouldn't buy it with 4.56s, LOL.
Edit: 26.5 tall tire, torqueflite with 5% converter slip, and 4.30 gear...... 70 mph at 4008 rpm.
If you really have 3.73s, and 5% slip.... 29.5 tall tire would be 3.123 rpm at 70mph
2nd edit: checking gear ratio is EASY if you have a sure grip. Jack up both rear wheels, neutral, turn the tire one revolution, and count the driveshaft turns.
Click to expand...
OK. I jacked up the car today and verified that I have 3.73 gears. The driveshaft went around 3 3/4 turns to 1 full turn for the tire. Right on the money. 3.73 gears. That's good to get out of the way. It's one less variable to worry about. Now.........I gotta get that speedometer hooked up!! The cable is there under the dash. I gotta crawl up under the car to see if it's hooked up to the 727. :BangHead: