Set them to the transfer slots first, .020 exposed or to what looks like a square. 'You can google the holley site for this' . Then set the idle screws abou 1/2 to 3/4 turn out both primary n secondary. Ideally you want the idle screws out the same amount all 4 corners and the blades open the same amount all 4.. but if you have tmo lower idle speed...close the secondaries some, little at a time.. 'The holley red book is a must have for beginners and details a lot of this crap'. I use a digital timging light and watch the rpms on the light...open the idle screws till the rpm reaches its highest ,and only up to and never beyond....from there fire it up n set the timing to 20 and let run....till warm... then advance the timing to 24....tshut it off then try n start it...from there advance 2 degrees at a time.. each time shutting it off and restarting it till the starter fights/kicks back....once it does... go back 2 degrees. That's roughly the initial timing it wants. Now note the timing and then reset it back to 20 btdc/Advance. Now Before you worry about part throttle/wot ...check the vacuum at idle 'for now' and then check the condition of the PV and its rating which should roughly be half if the vac reading you get with trans mission in gear brakes on ...again ..once you get the idle dialed...ex if 8 then 3.5-4.5 for automatic in I choose only about 2" below reading for stick cars or big stall.
