327 CHEVY ENGINE HP RATINGS

I have a 1962 327 that was originally a 300 HP that was removed from a 1962 Nova SS, that was wrecked. I want to know what is the difference between the 300 HP and the 365 HP versions of the engine.  I have changed the cam to the same unit is used in the 365 HP engine.. additionally I would like to know how to do an estimated horsepower rating based on the original engine rating with all the current modifications that I have done, which are bored .060 with 11 to 1 compression pistons, double hump heads (300 hp) cut .020 and ported, headers, Wieand Alum. HI-Rise Intake, (from 68 302 Z-28 engine), Holley 780CFM Dual Line Carb, roller rocker arms, and 365HP cam and solid lifters.  

Difference is the cam and as far as I have seen the 365HP came with 2.02/1.60 valves and the 300HP came with 1.94/1.50 valves.What is the casting numbers on the heads and do you know the size of the valves in the heads now.  
Professional hi-performance engine builder

Horsepower sells motors and torque wins races.

Difference is the cam and as far as I have seen the 365HP came with 2.02/1.60 valves and the 300HP came with 1.94/1.50 valves.What is the casting numbers on the heads and do you know the size of the valves in the heads now.Also what is the brand of the cam you are using.  
Professional hi-performance engine builder

Horsepower sells motors and torque wins races.

The other thing is, the 300 HP motor had a hydraulic cam, the 365 HP motor used a solid lifter cam.  

I am not sure of the size Valves currently in the heads, But I will find out.  The Cam is a solid lifter TRW unit....and is supposed to be the closest thing to the cam used by GM in the 365 HP engine that TRW produces. I will reply back as soon as I have the Valve data, I do know the heads have been shaved .020, and ported....but not sure if the larger valves were installed at that time, these items were done before I purchased the engine.  

wheres grumpy! he would know