What did you do with the vacuum line to the intake for the vent valve?
Since I removed the OP's evap and the gas tank is vented to the atmosphere the same as my BV's, I highly doubt this is his problem.
Read the whole thread and now will suggest the "Stall of Shame" or better, a sticking vacuum operated fuel taank vent valve. To verify, quickly open the gas cap next time it stalls and listen for air "whooshing" into the tank. Then just leave the gas cap loose if possible.
Found it! Motovista, a sponsor of this forum has a FUEL VALVE. While it is a fuel valve, I bet it could be used as a vent valve!
I saw a post on here about a guy making aftermarket vent valves to replace the cheapo's that cause so much trouble. Anyone have that link?