Yessir, I read over it. What I'm having trouble translating over the the edelbrock between your directions and the manual are these two steps "2)With the Curb-idle screw,set the t-port exposure under the butterflies,to about square to rectangular,or .025/.030 high. 3)Set the idle-speed with bypass-air,and idle-timing."
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2) I read this, and your response to another member with a similar issue. This sounds like I want to close the butterflies with the idle screw JUST to the point where vacuum to the timed port dies off?Forget about the timed port. You have to open the butterflies quite far to involve that guy. I'm not sure how the .025/.030 measurement is used in relation to the t-port exposure. Should I pull the carb off the intake and set it using a feeler gauge? YES! You will need a wire gauge feeler. Or just eyeball it. Every engine is different so I cannot say that exactly .025 or exactly .030 will be correct. It is just a starting point and it looks like a little square to a little taller than wide. Eyeballing is fine for now. I also puts you and me on the same page, so I can tell you what to do later if it doesn't work out 100%.
3) This sounds like once the t-port is set in step two, I would get my idle speed set at the 750RPM spec using only the air the butterflys allow past them, adjusting the idle mix screws, and timing to get it in spec and smoothed out? Well sort of; the air flowing past the butterflies is now fixed by the speed-screw, so don't touch it again.The idle mixture screws will not or should not affect the idle-speed, only the idle quality.And they should achieve the best idle quality when set between 1.5 and 2.5 turns out.If not, then the sync will need a minor adjustment.The timing is the principal player in setting the idle speed now.
Oh yeah, forget about factory specs; they were designed to meet the regulatory agencies restrictions of the day and on the fuel available also at that time.
Sorry if I seem dense or stubborn, this is only the 3rd REAL carb'd vehicle I've had, and second Edelbrock. Never had such strange issues on the Pontiac 400, but this particular car has had a lot of very shady work done to it while the previous owner had it. Just trying to understand it and reverse engineer it all.