I just got rid of my boost elbow and installed a manual boost controller recommended by @kzimmer. It's the best $5.46 I ever spent on this truck.
Now when I mash down on the go peddle the boost gauge jumps to 26psi, trans shifts up and boost goes to 28psi. When it shifts to 4th, boost hits 30psi and speedo saying 80.
No more boost bleed off.
There is a lot more room on the adjustment for more boost so how much more boost can I dial in and still be safe?