Fixy,
To add to what panic is saying, too rich will leave black soot that will turn your fingers black. I found that out when my accelerator pump sprung a leak and I had to drive her home in a non-stop hurry (at high idle at stop lights).
Is this 216 a fresh rebuild?
Carl

1952 5-window - return to "as built" condition | 1950 3100 with a 235 and a T-5 transmission