CHEVY 5.7 V8 ENGINE

Hello again

I have few questions if someone can help me..

i have removed engine from my boat today, and i know that is 5.7 v8 chevy engine, engine code is 14088548 from back side (86-88) and v07016AP from front side.. i will do full rebuild engine but need few sugestions..

can someone tell me what is v07016AP sign from front side??
From where to buy rebuild kit, what stage to take (stg1-4), what gain power can i expect..

If someone build this engine, maybe some advice do i purhase another heads, intake manifolds and everything else..

I have holley 4bbl 600cfm carburator, and thinking to purhase Edelbrock Performer Carburetor 4-Bbl 800 CFM and intake manifold..

Im car mehanic...