quote:Originally posted by Kid:
Didn't do much today...
Checked whether timing chain jumped or not - #1 reaches TDC on the TC timing mark, so it didn't.
Figured out the carb is an Edelbrock 1411:
As far as I can tell this thing has no such thing as power valves...
Found a parts list, manual, and tuning manual of this carb on the net, but not a single word about a power valve.
I'll see whether I can get the coil tested tomorrow.
carb as on my GT5S Kid, indeed ,Edelbrocks do NOT have power valves. Lucky i would say , as on my vette's Holley i had to deal with those little "bastards"
, they can break from a backfire ! OK, now they have protection against back pressure : a one way ball-valve the size of a ballpen tip .... 
Those Edelbrocks have a far more solid solution for that : the 2 needles with different diameter shafts, going up and down with vacuum , and this way restricting more or less the opening in a jet underneat.
So "no" vacuum is rich, alot vacuum gives "poor".When and how much is istalled with choosing the springs pushing on the rods against vacuum and rods diameters . Simple and solid !
Had the same problem with my Vette at the time ... and it was ALL ignition related . I also changed the breaker points with a Pertronix kit AND a new coil ( designed for the kit and needing full 12V feed ! ) .Runs perfect.
I installed a relais , giving full batterie power to the coil and operated by the existing ignition switch.
Good luck !