Every Corvette application of the "097" cam with a 4-speed came with a 3.70 axle as standard, with options to 4.11 and 4.56; you could also order 3.08, 3.36, or 3.55, but hardly any of those were sold.being used in the 340hp and 360 vettes is why i asked about this cam. if i remember right alot of the vettes had 3.36 gears. i am upgrading to the 8.5 ten bolt and it has 3.23 gears in it. thought if it would work out ok it be a nice way to have a solid lifter cam and nicer gear to be able to drive it on the hiway. that along with no problems being an easy profile. i was thinking z/28 springs would be a nice up grade. by they way its a 4 speed.