Notice the quotation marks around "clones"??????? A brand new imitation might run as well as, or possibly better than an original that's been worn out, "rebuilt", and worn out again a couple of times over the past 50-something years. Ditto for Edelbrock VS AFB.
Jerry
Actually, I didn't notice them - sorry.
Had just finished making a fuel control valve for a Carter YS (underwater carburetor), and was maybe more grumpy than normal

Jon.