Mike, my helper got married and has all but retired...lol. I am researching with another group, and may have to go south to pursue the rear gear change. There is a ring and pinion out there that will bolt up in our housing, and the big problem is the TCU. It won't be as high as a 3.70 or 3.73, more in the 3.58 area...and doing the math, that is perfect in order to still drive it down the road and enjoy it.... I will know more once the weather breaks and I talk with Rudy, if he is available. I need to get my hands on the ring and pinion, then off to the south to work with another company. Like I stated, if you go to a 9 bolt Ford, or anything else, you are looking at a lot of work. Too much for me. I like keeping mine stock to satisfy the NHRA or it is pointless.. You modify in any other manner, you are thrown into a class of "race" cars...front wheel pulling monsters. Now, if you don't race legally, who cars, right? ..... It isn't dead yet....