Will the rpm's continue to increase, and just not your speed, or does engine fall flat after 65mph?
If the diffs have 5.29 gears, with 31's you might top out around 70 speed wise, the higher gearing should be very noticeable thru all the gears, as well as a lot of heat coming through the floor around the trans tunnel at highway speeds. Had a 2wd w/4.10's and 205's, it would scratch the tires shifting into 3rd, and max out about 75 in 5th, but the a lot of heat would come through the floor at highway speeds.
