vacuum test on 340 with 292/501 comp cam

The comp is close to 11.0-1. I dont see this car idleing at 600 in gear. Maybe 800 -900. I just got this motor running and I know I have some adjusting to do but it seems pretty happy where it is. I disconnected the advance and all the other vacuum inlets are plugged. I was reading on some of these bigger cams to not even run the advance. The motor fires instantaniously, and is violent sounding( it pops)open headers and tachs up with no hesitation. I think i"m at least heading in the right direction.