Just thought I would give a little info about what I ended up with while going through the set up process on my Holley for an: amc 360 with a 9:1 compression and a comp 260H cam.
First: there is no way that this carb would have worked properly out of the box.
Stock..25cc accel pump
Stock...o65 power valve
#62 jets in primary (#68 stock)
#74 jets in secondary (#89 stock)
silver(plain) secondary spring (nothing lighter)
red or orange cam on position #1 (light vehicles)
.031 pump discharge nozzles (.028 stock?)
Keep the floats level and the fuel beow the sights for the best offroading.
Distributer adv. @8-10*
I live at 3,700 ft. and although Holley recommended downsizing to #64 I found #62 to work best. #89 jets for the secondary are silly.
While I only see 14-15" of vacuum at Idle, the performance both on and off road is excellent. Idle at severe angles is constant, and engine restarts without floooding.
Hope this helps someone else, as I had to go through many trial and errors to find out these basics.