Last chance to stop me from buying the hype...

PRH said
I can offer my take on it......

If a customer wants to use those carbs on their motor...... no problem.
And if it works good ootb, that’s great too.
But if it doesn’t, and you have to start chasing the tune on the dyno....... at $100/hr...... it gets expensive real fast.
Time is $$$$........ so, if you want the engine shop to experiment....... be prepared to pay.
And it doesn’t appear jet changes are going to happen quickly with those carbs.
Screws are in the base, accessible from the bottom...... so the carb has to come off, and apart for a simple jet change.

Also, I’m going to say it’s “highly unlikely” that in a single carb application where the motor had a “bigger” cam that the idle circuit would be up to the job.

same thing I thought at first when I found out the screws were on the bottom of the carb, "BUT", I read further and found out that you don't need to put those four screws in the bottom of the car to tune it. You can leave them out and just use the two top screws while tuning and be able to pull the whole carb apart from the top until it's tuned then take them off but the four screws back in..
Also I've never had my car at a Dyno shop and never felt the need for it. It's like paying somebody to have my fun.. this is my hobby and my fun and I like to take it down to the track and take passes and make adjustments..