Get an adapter to bolt on a 600cfm edelbrock with electric choke. Just check for hood clearance issues, the adapter is about 3/4" or so and the edelbrock is same ht as quadrajet. In a pinch edelbrock makes a Q-jet replacement so you wouldn't nned the spacer - i've never had bad luck with them just limited experience and the regular edelbrock have been made by the multimillion and they git the bugs all worked out for sure.