HELP! 66 cuda idles fine, but not when in gear

If the intermediate shaft was installed correctly, by the look of the vcan, youve got alot of timing in it. And as was said, move the 2 large vaccum lines. Pcv should be at carb, booster should be full manifold vaccum. Im not a big fan of edelbrock carbs, but thats just me. A 700 or 750 holley would be my choice. My 360 with a similar spec cam, 3500 converter, likes to idle in park or neutral around 1k. In gear is @650 or so. A properly curved distributor will make a huge diffrence. Hallifax hops did one for me, and its great and price was extremely reasonable