A 727b will run with just about anything in it type F,FA,Dextron II,III ATF+3,4 some guys even use tractor hydraulic fluid never really seen a difference between F or Dextron ot the sny for that fact other than the syn do run a few degrees cooler

70 duster full chassis super pro 416 CNC Indybrock heads 727 w/brake

best so far 1.212 60 6.219 in 1/8 at 110.88 9.768 at 137.81 1/4