71 Duster 360 turbo build

Are you running a 904 or 727?
It’s a 727 with crt rebuild kit, 5 clutches up front, bolt in sprag and their manual reverse valve body. If I rebuild it will be a full roller setup with their drag sprag and a billet front drum. Still not positive the trans is hurt, but better safe then sorry. To the best of my knowledge the low bad apply in their valve body would hide a faulty sprag?