Very interesting link.
There is a notice that files are not going to be saved after 30 days in the near future?
I cannot seem to save them to my MAC for later use.
With IR Webers I really have no choice but to upgrade.
Any IR Weber intake will have virtually no vacuum to run a booster unless modified to cross-connect the runners. But that also impairs the IR performance.
My engine is a cross-flow.
I am told it also has silly high compression and a wild cam.
I think in the 90's we were still able to buy the good leaded gasoline.
Now I expect to run a mix of 91"Supreme"

and 100LL Avgas.
Even when real fuel was available I used to do this for a crazy FIAT 850 Spyder I had as it was a lot cheaper than race gas.
EDIT: Found the download icon, putting those drawings into a folder now.