Once my truck comes off of fast idle it won't idle. I'm guessing since it sat around for 4 months without being started that the pilot jet is probably plugged. Does anyone know where I can get a parts breakdown for this carb?

 

This sounds weird, but I would check two things first:

Are the fuses good?
Is the carb harness plugged in?

The warm idle has a fuel cut solenoid that won't let it idle if there is no power to it.

Here's a good site:
http://www.bluebassdesign.com/boonin/carb_faq/