carb choice and slick size

While a 750 carb will work perfectly fine in your application, i believe i detect a little more "street" in your post rather then "strip". If your staying with the 3.23's, you'll be just as happy with the 650 in my opinion. And yes, the Thunder series is the Eddy carb i would choose.

It will see the strip a lot I hope this year but I will be driving it there its not going to be a trailer queen. I may change gears to 3.55 or 3.91 in future but not sure. I think for now the 650 thunder series would be perfect...