360 mopar wondering estimated HP??

The comp. Ratio is determined by a lot more info than you give plus the cylinder head cc amount you think you have is probably VERY inaccurate because you read it in a book. That book is more likely giving you the min. cc amount that the head can have rather than the actual amount which would require you to cc the head. All the things that are needed to be know are;

The pistons deck height & the amount of cc's the piston has for the valve reliefs or dome cc amount. The KB-107's have a (IIRC) 5cc valve relief.
Head gasket thickness & bore size
Cylinder head cc amount
Bore and stroke

To help calculate the HP level, the cams duration at .050 should be given because there is a lot of free play in the advertised duration.
The header tube size should be given though most know your header is @ 1-5/8 in the typical 1 size fits all header design. Also the exhaust tube size. 2-1/4? 2-1/2? 3 inch pipe size?

Just incase you didn't know, a simple FYI, the cylinder head casting numbers are also located I between the middle two runners under the head. With the intake removed, you can use a mirror to see them. Otherwise, the head has to come off.
The have moon shape in the cylinder head is supposed to be there. No worries.

The only thing in an day about your build is that all your missing is cylinder head flow. Once you port them puppies out, it's gonna wake up!
Minus the ported heads, nice combo for power and fun. It should be real enjoyable.