Wow, thanks for all the replies. I'll start going down the list you all have provided. I'm starting to think its with the rebuilt carb. When we were able to get the truck started before I bought it the PO was able to rev 'er up without this choking. Looking at your responses though I could see it being any one of those and will check each out.
To answer the questions:
Does it cough? Not that I noticed but I will listen for it. I did notice a couple backfires when the mixture was too lean.
Low fuel pressure? I honestly do not know, I will look into how to check that.
Thanks again guys. I'm looking forward to trying your suggestions.
Jay
