I have found that if the Quadrajet is set up right, you should be able to fully disconnect the choke coil, and start it - just be sure the primary/choke top butterfly is nearly closed.
If you are able to get it started fairly easily with the choke coil disconnected, and the problem is really only when that coil is connected, then you have something askew;
Verify that you have the correct coil - and that it's pulling the choke to nearly closed when you hit the gas pre-starting.
That video was a Buick(?) Quadarjet, and it mentions that the BB Chev have a coil that goes the opposite way;
With our Pointacs, the 2bbl and 4bbl coils work the opposite way.
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1970 Formula 400
Carousel Red paint on Black standard interior
A no-engine, no-transmission, no-wheel option car.
Quite likely one of few '70 Muncie three speed Formula 400's left.
1991 Grand Am: 14.4 @ 93.7mph (DA corrected) (retired DD, stock appearing)
2009 Cobalt SS: 13.9 @ 103mph (current DD; makes something north of 300hp & 350ft/lbs)
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