Here goes ,got a 539, 4.125 stroke 4.560 bore has dished blower pistions ,using chevy iron heads 119 cc single 850 need cam advice ,have a procharger for it but want to run with low comp first probably 8 -2 -1 compression any thoughts ???

Pro Chargers seem to like 9:1, 112 LSA. What are you planning to use, hydraulic, solid, flat tappet, roller ?

THis is not a suggestion. Just a WAG and see how close i am to those more experienced in a combo like this.
240, 248 112 lsa
maybe 240, 250 112lsa

What dish size (in cc), and how far down in the hole are the pistons? You may not have the CR you think.

Deck is zero not sure of ccs of pistions,looking for solid roller,741?? Something easy on parts

Crane 651 works pretty well NA and boosted.