28* initial timing for a 318? How can that be?

mopar head said
Typical holley arrangement, ported above the blades, manifold on baseplate.
There in is the rub. My plates will not close enough to get the square idle restriction. I`ve tested out on the bench with a 12 volt supply and got the choke to fully open, look underneath and not square, turn full throttle, still not square. the choke steps stay on the last step unless I manually flip it off the step then low and behold there`s is my square idle port. My thinking the only solution is to remove that last choke step?

Is the choke holding the throttle open all the time or is the throttle open that far all the time?

If it is, you need to close the throttle down and make it idle with the throttle blades above the ported vacuum hole at idle.

Plus, if you have the throttle that far open it’s pulling fuel off the T slots as well as the idle circuit.