Snowman & Boucher, did a low dollar turbo install.
I think Boucher ran as high as 10 psi & Snowman ran as high as 15 PSi on stock long blocks.
Even @ 7 psi, you will be able to feel the torque & would be satisfied w/the power output until you were to build your good engine.
You just need to keep it from detonating.
What car do you have, an early Nova?
MBHD