Your still not telling me if you cc’ed the cylinder with the piston at top dead center. This is going to make a difference in CR. I doubt your going to make stock hp with less than stock compression. Compression is a huge part of the equation.
If he didn’t have jets, he should not have even loaded it on the dyno till he did.
Did you have the advance curve checked?
If anything, your avs is too small. Using a dual plane intake, 4 cylinders are only getting 275-300 cfm. The other 4 are getting the other half of the carb. Think about that.
Did he have jets,air bleeds,power valves to tune the holley he used?