Tune-up and valve adjustment: check
Checked for vacuum leaks: check
fairly new O2 sensor: check
new cat: check

timing set with shorted connectors
camshaft, EB 261C brand new
So I'm down to leaky injectors, leaking cold start injector and the gaskets between the pipes, wich I only tightened.
It's only at idle the HC is too high. It lowers dramatically when raising the rpm, around 40 @2500
Cold start injector, what is that?
At idle the engine feels and sounds like it?s missing a bit. It's not a completely smooth idle, but I assumed it was just the chattery type idle from the upgrade cam shaft...
One other thing sometimes when starting the truck, when warm and sitting for a while, it failes to fire directly. Then it takes quite a few turns on the starter to fire it up. I had a feeling that maybe it was a fuel pressure issue...but maybe these problems are connected to eachother.