I ran a 727 for years. At 1000 HP you need the good planet $500. Outputshaft is a high probability and it's $500 and will not drive your speedometer. Then tranzact or griner vb $500. Then you will notice everybody out E.T.s you and your mph is down. Spend some more for a 1/2" midplate and a gm shell converter to hold the power. Even the pro trans comp guys use a gm converter.

I love my true blue Mopar stuff. But, this something to think about. My glide uses a stock case soon to get replaced aftermarket. Reworked stock pump band the rest is aftermarket. The high gear clutches are 904 as well as the filter. So it's Mopar now.lol. Dragpack challengers have the same.