I'll lay out the whole situation as it looks presently. Car is '73 sedan deville, stock 472 engine. Plan is to run stock manifolds, intake and exhaust, with dual exhaust instead of the single hiss-fest stock 2 1/4" pipe. Here's where it gets kinda hinky: I just happen to have a davis technologies traction control system sitting around. Assuming I can get a reluctor wheel to fit the pinion yoke of the cadillac, I plan to install that. However, instead of using it to just retard ignition timing (going to be using a digital 7 msd box I also have sitting around, triggered off the stock points setup in the stock distributor) I plan to use it to tell the nitrous controller to pull back the nitrous when there's wheel spin. There is a controller available that can do exactly that, using the davis system as wheel spin detection.
Fortunately, that nitrous controller also allows a delay between full throttle switch being closed and actual start of nitrous injection. I figure that feature will allow me to delay the nitrous such that the secondaries have had time to open, which in turn can be fine tuned with the clock spring and choke pull off delay. A weird combination of very old technology (points ignition) and pretty advanced (traction control and progressive nitrous). Getting away with a top shot instead of a plate would be the icing on the cake. If any of you have some guidance as to how to best use a top shot safely on a quadrajet I'm all ears...