"Last is carb. I’d like to have a Holley. He says they all leak and only uses them on race cars. He prefers an edelbrock carb."

You have a cool build going and your builder wants to put a CarterBrock on top because all the Holleys leak?

You are right to doubt his advise on this one. Whatever you put on top of that stroker will need to be tuned. And a CarterBrock is a real pain to find tuning parts for and to tune compared to a Holley. Especially in the very critical idle and off idle area. Unless you have a very talented CarterBrock tuner handy, there is no way you should put one on top of that cool build. And if you doubt that, just look at a tuning chart for the CarterBrock that you are considering.

Here is one example: https://edelbrock-instructions-v1.s3.amazonaws.com/edelbrock/carb-tuning-guide.pdf