I've had VERY good luck on my 64 Dart with a new Edelbrock 650cfm about 10 years ago. I'm considering one for my 67 Imperial 440 to replace the AFB. What CFM would you recommend? And do the electric chokes work well and how do they work?I have a new (well, it was new in 1997) Carter AFB on my '71 Imperial. It is a 625 cfm version with the electric choke.