Won't start help....
 

Just got the new motor in, was running 60# injectors before. I haven't retuned yet and went with 36# injectors. Car stars but struggles and if the gas pedal is even touched it dies. Could this be the PCM is tuned for the larger injectors?
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Yes, if your tune was for 60's and your now running 36's I wouldn't expect it to run very well if it ran at all.

Why? I'm on board with ya but can you explain the why to me? Thnx for the response.

The pcm only knows what is programmed in the tables, it has no idea you changed injectors. Its trying to run what injectors are setup in the tune. Basically you have incorrect flow rate, min pulse width, pulse width, injector timing and possible a couple more tables that are incorrect. If your injector data is inccorect it starts a snowball effect on throwing other tables off that affect your fueling.

This is true. You are flowing almost twice as much fuel as the computer knows about.