won't idle, looking for expert advice.

[shorty402]

Afternoon all. I have a 69 swb 402/t400. Cant get it to run at idle. If have to hold throttle to about 2k and hold choke almost completely closed to keep it running. Accelerator pump works fine. Im thinking idle circuit not working or possibly a huge vacuum leak. I am going to take carb apart and clean and look for any obstructions and plug all vacuum ports on carb and intake. Any other suggestions would be greatly appreciated.