I could only get .200+ until the input of the trans bottomed in the vert.I took that and measured the vert bolt pad from the front of the trans[.630 ish] and also measured the flex plate from the back of the engine .380 ish. on a 727 RB tho.I also greased the vert input and slid it in the trans and looked where the grease ring was when removed to hel get the depth of the drive to pump.I hope this helps.