Thank you all for the replies. I have learned a lot.

Good news is that I have the old 57 running again. I have to admit that the carb was partly at fault and I was partly at fault. Being a newbie to this, I had a few things wrong. But the card did have a stuck needle in the open position. I replaced them with new needles and they seem to be working much better.

Man, the new intake and carb have really given my 283 a new life. Much more power than the stock intake and carb.

Thanks to you all,
Ron