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Schoenen Nachmittag!

Thanks for the quick responses. I had hoped that, in your vast Model A country, these experiments had already been undertaken; thereby sparing me the trouble of a failed attempt.
Presumably, there were no successful outcomes; the idea would have been too simple. The folks at Ford weren't fools,

It’s not that I’m looking to tune up my car; I want it to remain largely as it is. I don't consider it suitable for high-speed driving.

However, I recently had to re-bush the throttle shaft, and I thought that - while I was at it - I might be able to squeeze out a couple of one or two extra horsepower "for free."

I’m going to do a try; I already have a spare venturi ready.

Either way, I’ll let you know how it goes. I don't think, that the engine runs better in all RPMs. But I try it, it ist only little work with no costs.

Thanks again for your hints!