Timing can make an engine act pretty weird and do strange things. Read the following links to learn more about your timing. Having your intake and carb loose didn't help things either lol. I looked up the number for you Carter and it says its equivalent to the Edelbrock 1406. Not a terrible carb by any means. Some like them, others don't. I have a 1406 and I rebuilt it and have no issues with it. I would buy a rebuild kit and calibration kit and run it. They're stupid simple carbs to rebuild. 2 problems with them tho; they don't like high fuel pressure and they carb boil. High fuel pressure makes them flood essentially. You can either buy the Edelbrock fuel pump which puts out the right amount of psi, or add a pressure regulator and set it at 5.5 psi as recommended by Edelbrock. I went the fuel pump route cause I needed one anyway and have zero issues. The new carb riser you bought will help get rid of the hard starts from the carb boil. Did you ever find out what is up with your dizzy?
http://67-72chevytrucks.com/vboard/s...d.php?t=274806
http://www.camaros.org/pdf/timing101.pdf
http://www.stl-vettes.com/65Vette/co...ng_Advance.pdf