Got this 2.8 in this 86 blazer i bought, it seems to run good for a few min then act like it wants to cut off and sometimes pops back through the TB ,Also seems to run pretty rich. here is a little vid. Let me know if you guys have any ideas.
http://www.youtube.com/watch?v=375zjnU8IdQ

 

Have you checked for any stored codes?

Youtube is acting up and I got annoyed before I could finish the vid

 

no codes.