Pressure is definetly quite a bit low. I generally see close to (sometimes over) 100 psi. with a valve body like that or a stock vb with a trans-go kit. The sealing rings on the pump stator won't affect pressure in 1st or 2nd as their job is to seal oil pressure going to the front clutch pack. They'd affect it in 3rd gear or reverse only. Since it did this with 2 different valve bodies my guess is the pump is worn out.