Stalling Smallblock....Edelbrock Woes...

I just put a 1407 Edelbrock on my truck. Stock longblock, Comp XE262, performer intake, headers, and MSD. It idled ok, but not great. What I found (over a few days of looking)...
When I drove it to the gas station...It went from 180° to 235, and pinged like mad. Was misfiring at anythign over 1/4 throttle, and skoed (blue) at idle. What I had to change:
I found that the carb had installed at the factory a set of step up piston springs that were rated for 3-4" of vaccum at idle in gear. These richen the mix under load and throttle by lifting the rods out of the jets. So the vaccum you run at is crutial. This engine runs at 10" at idle in gear. Swapped springs to the 8" plus pair and added a rod that had .002" smaller cruise step. Choke was wired improperly (before I got the truck..I just connected wires). I connected it to the right source, and choke was close..just needed to richen it slightly by turning the choke cover. Finally, after getting my timing curve where I wanted (15° initial, 20° centrifical, plus vaccum), I se tthe idle to 750 and balanced the mixture screws. Now it's two pumps, turn the key, and it fires right up. Idles well, no staining of plugs, no smoking, and it spins the 32" Mud Terrains nicely..lol

IMO, a typical carb install and setup. Holleys need this too. The car may run decently, but it's by no means "perfect" in most cases until it's tuned for YOUR engine in YOUR location.