This is an electric choke replacement over the counter carb with a EGR provision and Chevy throttle linkage. It has the small primary at 1.38. We generally call them 800 cfm carbs but they are closer to mid 700 cfm's.
Click the link below for the "Vaanth" write up. It is largely accurate. It should be most helpful.
http://www.mopar1.us/thermoquadguide.html
