Hello, I am Michal from Europe, Slovakia. I have RX 7 FB from 1982.
Ports are stock. I have a WEBER 40 DCOE carb and I want to use this
for road-race, but hobby use. This carb is good for it? And if yes,
do you help me with jetting ?

Thank you very much
Michal Dibala

It will run on it.

Power will be modest.

People usually use the 48 mm down draft weber.
I don't know anybody that can help you with that size weber.
I suggest you get a wide band mixture monitor to help you
tune it.

Paul Lamar