car idling

:drinkers:Sounds to me like it's LOADING UP when you put it in drive because it has a very large cam in it.
That is the biggest hydraulic purple shaft ever made.
320 adv.duration but the overlap is 104 degrees.
To put that in perspective the .484 cam that everyone is familiar with has only 68 degrees over lap.

:drinkers:The second and just as important reason is you are not running a power valve and it's dumping raw fuel in all the time.
The power valve holds back the additional fuel until needed at full throttle.

Run a 2.5 power valve, because it's the smallest one they make ,and you will need it for that cam because it's really big,and put 72 jet's in the front primary metering plate.
ALSO:Run a 4 hole 1 inch spacer (THIS IS SO IMPORTANT FOR YOUR SET UP)
I wanted to run that cam just like your doing.
I would run a 35 front and rear for the squirters.


THAT IS A STANDARD HOLLEY 750 DOUBLE PUMPER- RIGHT????
It is gold in color and not silver - right?????