Any idea what kind of compression this 383 combo might make?

[bull]

Something I found on craigslist. Probably not enough info here to make a good judgement but what the heck: '69 magnum casting, fresh big valve 906 heads, .030 KB dished pistons, Comp "hemi grind" camshaft,Comp double beehive springs, double roller timing chain

[Chryco Psycho]

depends on the CC of the dish , a flat top zero decked will only be approx 8.9 :1 with a .038 head gasket , so less than that

[Runner]

i cant find a dished kb piston for a 383 on thier websight and i dont believe beehive springs come in a double spring.     so id say its hard to guess whats really in the motor