I'm interested in what kinda calculations you did to figure out what carb size you need. Cause I suppose there are few different ways to do it. You could take your horsepower and times it by 10% for each lb of boost to get a new HP number and then see what carb supports the necessary power.
I tried a carburetor calculator on the internet. It needed engine size as one of the parameters. I know your engine is a 250, but under 15 lbs of boost (twice atmosphere) it'll take in twice as much air and therefore be equivalent (if I'm right) in airflow needs to a 500 CI motor. And when I put in those parameters (assuming 5500 RPM redline) I get 800 CFM as the carb requirements. I have no idea how good a calc it was.
And yeah as far as turbo motors go it's always best to go too rich and with too much fuel rather than too little. You break a lot more stuff leaning out a turbo motor than a NA one.
I'd love to drive such a car too. She'll be amazing. Just like I said above, it'll make power under 15lbs like a 500 CI motor would NA. Jeez that'll be nice. And as soon as you let off the gas *poof* fuel mileage of a 250. Not bad at all!!
