i need help on where to start! (carb setup)

this is my combo:
'72 318, .030 over, kb167's zero decked, scat i-beam rods, forged crank, fully ported RHS heads with 2.02 intakes, comp xe285hl cam:

http://www.compcams.com/Company/CC/cam-specs/Details.aspx?csid=632&sb=2

10.1 static compression, solid lifters, roller rockers, 978 dual springs, msd street fire box with electronic ignition, rpm air gap intake and the suspect problem, a holley 750.

the problem:
i broke in the cam no problem and added the inner springs. whats happening now when i try to set the idle it wont run under about 1600 rpm. its acting like its running out of fuel because if i touch the throttle the accelerator pump squirts and it revs up for a couple seconds then starts to die again. timing was at about 22-25* at 2000 rpm and plugs looked new after a half hr breaking in the cam. the carb is from a fellow member. its a holley 750 dp with mechanical secondaries. it has billet metering blocks and a proform main body so no choke and 4 air bleed screws. im tearing it apart tonight to see whats in it but theres so much going on with this thing i dont want to just guess and check.

any help on a good baseline setup so it will at least idle and be driveable?? thanks in advance for the help, looking forward to finally getting it back on the road after a long winter