360 Questions.. pardon my ignorance.

AJ/FormS said

What does

the fast Idle cam have to do with anything?
Of course it's going to stall coming off the step, cuz the T-port got slammed shut.
The T-slot exposure is set using the curb idle screw on the curb-idle stop, the absolute most closed the throttle can be, with absolutely NO interference by the fast idle system.
Where did you get the idea to use the lowest step of the fast-idle cam?
Start over

Click to expand...

That was for a point of reference. Like I said, off fast idle it wanted to stall. I’m not using the fast idle cam for anything different than normal.

Last night I pulled the carb again and yanked off the baseplate. I didn’t find any cracks or anomalies so I cleaned it and reinstalled it with a fresh gasket. Set transfer a lot to a square and mix screws to 2.5 turns. Ported vacuum now reads almost zero at idle and jumps up when you crack the throttle so I think the gasket fixed that problem.

Here’s where it gets weird.. now with the vacuum can disconnected I’m reading about 20 degrees advance at idle, which is still a LOW idle. So I’m assuming either my distributor is trashed (quite possible, parts store special), my timing light is going haywire or I have something internal to the motor with more slop than it needs.

I think my first step is going to be turning the crank by hand and watching for slop in the turning of the distributor rotor.. then I’ll move on to pulling the distributor out and inspecting it and reset it in the motor from scratch.