its an adjustable vacuum secondary.
All aboard the Yankee express, next stop October.....

Please also post in the question I asked previously if it:

a vacum secondary, progressive secondary double pumper or a mechanical
secondary conversion with the gear kit?

Refinish King

the choke is wide open, that was the first thing i checked. i set the timing to
12 initial and the car was running a bit crappy i have a decent size cam. so i
went to 18 degrees. i have about 14 hg at the base of the carb with these
settings. which is what comp cams claims i should have, its the 276 xe cam.
230/236 duration @ .50  still when the car is in drive it barely idles. im in
the dark as to what exactly happened. in park its idle is around 1000. in drive
it falls to like 425-450. i don't want to leave the idle at 1500 to have the
car idle at 650 in drive.
All aboard the Yankee express, next stop October.....

make sure choke flap is wide open when car is warm

after adjusting idle make sure your timing is good my suggestions 9 to 12
BTDC in your case

"Hitman0187" .

it's possible the choke flap closed a bit on ya.

for those unaware of any of my previous posts i have a holley street avenger
carb on a small block 355. I shut the car down yesterday at the gas pump and
when i restarted it the idle was screaming at 1500 rpm and wouldn't idle down,
it was mid 80's yesterday and i was driving for a while so it had no buisness
even trying to warm up. when i hit the throttle to drop the idle it stumbled on
tip in and then only went down to 1500. in drive the idle was normal at 650. I
went home and lowered the idle screw to normal rpm and it was runnin a bit
rough. when put in to drive it would stall. anyone have any idea what might
have happened?
All aboard the Yankee express, next stop October.....