If this does not work, may try to find someone who can do air / fuel check on a dyno to try to speed up this process and dial it in?
Don
gt350bp
I would recommend staying away from the "chassis" - "inertia" - "wheel" or whatever you wish to call it dyno services.
First and foremost this process is not well suited for recreating your real-world part to transitional throttle event as experienced, though with some "fishing" with an experienced operator one might be able to find it, sort of, therefore it is probably unlikely that any real benefit in the arena of your concern would be realized.
We have repeatedly over the years (decades now) looked into the acquisition of one of these dynos, but after in-depth study with several manufacturers, each time we walked away. The issue here is realizing that we would have to spend a lot of money, and then participate in the general misrepresentation of what they are capable of, and how they are often utilized for the purpose of reaping income; or otherwise then after making the investment, then finding ones' self talking many of these potential customers out of spending their money.
The Holley carburetor is not that complicated, and if reasonable for the application intention, with some study and consideration of function most anyone of reasonable faculties should be able to make for good function. I have always been a believer of the best tuning will be accomplished in the vehicle, the owner/operators' butt in the seat making the observations, then through if only trial and error, executing the tuning process him or herself, and then drawing their own conclusion of if the effort produced results of better or worse have been had.
After all, it's just another event, in the enjoyment of the ownership of an old car...................right!
Scott.