* What I do is mount a movie camera during most runs, so it sees the tach, oil press, fuel press, maybe more. Gets real interesting but also you can watch the launch RPM easily that way. MUCH cheaper to watch the movie later (crank the home stereo too) than make all those runs again. Less fun though.
* The Gonkulator is a computer program I started writing back in the 1970s for TQ/HP and ET/MPH. It got its name over on Fordfe.com, but I also run a Nova 6 so use it over here too.
* I didnt know you run a Ford 9", they cost about 2% power, so the Gonkulator figures youre only maybe 4% out of tune. And thats a guess of course. But 4% is very possible to find with timing or jets/air bleeds. Do you know what your timing curve and jets/air bleeds are in there now?
* Good idea on the 4bbl if you can find one, to compare. Might or might not be better but at least you'd know.
* Another reason I'd rather fiddle with carbs etc is, all these engines are so old, I dont like to risk higher revs, its not like a new block is waiting at Autozone (or Gratiot Auto to go way back). I hate breaking parts but especially OLD parts.
* Post back if you get more data, GMC timeslips are very rare so I am glad to have some real data for the Gonkulator.