Rebuilt 727 feels tight?

I recently rebuilt the 727 in my Duster after blowing the seal out of the front clutch pack, while i had it apart i put in all new seals and a bolt in sprag.
Also put in a Transgo 2 shift kit, i followed the directions exactly. Trans is back in fluid is fool (checked it 3 times) it goes into reverse fine but when i put it in drive or even 1st or 2nd it feels tight, the best way i can describe it is if you have one foot on the gas and one on the brake at the same time.
I thought maybe it was the shifter cable adjustment was off and it wasn't going into gear all the way but it's working correctly.
It seems like it trying to go but it's screaming and will barely move.

Any ideas what it could be? I'm not sure if it's something in the valve body or the trans itself.