a holley 750 dp 4779 comes jetted around 71p- 80s....you gotta lot of jet in the primaries....Does the carb still have the power valve in the primary side?
my setup is close to yours 360 w2s but my cams a solid and a little bigger.i run autolite 63s at 40 gap and 34 degrees.it goes to 6500 easy.my jets are 72 80 same carb.