ok. i just put 373 in my car..but before that i did notice the rpms were always high in this car..it is a 95 cobra.with the 373 on the highway im hitting 3100 rpms @80 mph. at 70 it is 2800-2900rpms.. i have a 23 tooth speedo gear in.but i know those arent always accurite. but even with the 308 it was high. and that had a 21 tooth gear...all my other stangs were never this high?
. I used an 6 tooth drive gear, and if I remember correctly a 18 toogh driven gear.