I have a Chevy 327 small block V8 from a 65 vette sitting in my 57 chevy 3100 truck. It has the 202 heads...high output trim with solid lifters and dual point ignition. also has a holley 650 CFM carb and edlebrock performer intake. I believe it still has the stock cam, but dont know for sure seeing as how i havent taken it apart. How much horsepower should I assume the motor has, and how much can i tweak out of it with minor upgrades?