Going to do this, too. Do you have a converter lined up yet?
If your Hard Core and don't need/care about Lock-Up Converter , they make a adapter shaft to use a C6 converter if you want , you would have 4 speeds just no Lock up torque converter clutch
If hardcore is a manual valve body, ratchet shifter, Police driveshaft, and a 5.14 spool for daily driving, then yeah OK. I see now that TransGo has that shaft for AOD; should I assume it works for 4R70? How about 6R80? I have two loose 90's AOD's and two loose 4R's, but I could dig a 6R with a paddle shifter. You know anything 'bout those transeses?