so I blew reverse again.

If you have a second valve body ,try it.
If it still happens then pull the transmission and find out whats wrong.
I had a cheetah valve body that was not working in reverse.
I had to rev the motor very high to move the car in reverse.
It also shifted very easy \\\ too easy
First to second and to third where so soft you could hardly feel the shifts.
I put the stock valve body back in and the transmission worked perfect.
It is the brain of the trans.
If you took the valve body apart, it might be put together wrong.