No .25 might be the spec for a newer cam.

Are you sure your compression gauge is correct? And I wouldn't stop cranking so fast. I let them crank until they stop climbing.

My 98 Chevy Lumina with a 3.1 and 202k miles has 180 psi just for comparison.

My 68 440 in my Satellite had about 120 psi, needed rings. I did a full rebuild. At 120 psi I don't know how many miles were on it, I'd say more than 100K but it was clean. I measured a couple of bores and came up with around .004-.006 bore taper. (they say rebore at .004, I wouldn't be afraid to re-ring it but I wanted a fresh engine for once).

Less than 100 is bad news bears. Maybe they used the wrong size rings or something, or maybe never seated them properly and glazed the bore.

Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street