New plugs, wires, cap and button. 91 4.9 I6 4x4 has a miss to it and wants to studder on take off.. any ideas?

 

Checked your fuel pressure ? Should be 45 to 60 psi on that motor.
Miss show up before or after the new parts ?

 

Checked fuel pressure it's good and it's been before and after I put the new stuff on

 

That's OBD1 you can do a self test for codes. Sean has a post on how. Also check the fuel pressure regulator vacuum hose for gas smell. And all the other vacuum lines for leaks - especially where they hide under the intake on top of the motor. Or disconnect them all at the tree and plug them to see if that makes a difference.
Test the TPS with a voltmeter for a possible flat spot in the voltage. The IAC could be messing up but that's mostly just idle. Check all the injector wires for a possible broken one - I've seen that before. That's a few things to start with anyway.