Hi guys, I am going to be transplanting the 327 from the 77 Camaro in my sig to the 83 Firebird. The Camaro will be getting a Dart headed 350 with my Holley Stealth Ram.

Anyhow, the 327 has a .462/.482 219/229 @0.05 110 LSA flat tappet cam.

I know on the old Qjets, you used a very long skinny drill bit to drill out the idle orifice restrictor, at the bottom of the brass tube pressed into each side of the casting behind the booster. I would also open up the idle discharge port size in the base plate. Do I make the same mods to the CCC carb so I can get the idle rich enough to be able to have adjustment using the IAB? I think I can get it to run fine, heck I had a TPI computer controlling this cam closed loop. It does idle choppy though.

I wouldn't drill out anything in the CC-QJet before you try it out. I've used stock CC-QJets on much larger/bigger cammed engines than that. The computer actually runs them quite well, usually, since the carb is 80% self-compensating for changes in airflow anyway.

Just set the idle mixture screws out about 5 turns and do the rest of your idle tweaking (in closed loop!) with the IAB adjustment. There's actually quite a bit of adjustment range in that setup, believe it or not.

If you drill stuff out you're making permanent changes that the computer might not be able to compensate for.