Hp/torque?

I know this must be really hard to answer, but in what Hp/torque range would my engine be in with current build?

-76 318 block with hydraulic lifters.
-66 heads flat underneath för better comp.
340 cam, no idea of year.
Edelbrock D4B manifold.
Holley 4150 Race 600cfm DP.
Ignitor kit and Flamethrower coil.
Standard headers.

I have gotten information that the 600cfm is to big for me engine and are now testing a 450cfm SP, better or worse?

Sorry for any misspelling, dont have English as first language.
Author: admin