Which one is stock for my 1994 12v?

 

I had a #6 plate in it but was going to put it back to stock. I cannot get it to run right. Seems like when it gets warmed up starts run rough, wanting to stall out. I have changed fuel filter, cleaned pre-filter screen, replaced lift pump, replaced short hose by fuel pump, and suction and return fu lines. Could it be my timing is off?

 

The one on the right is stock, what is your idle rpm, needs to be around 850 in gear if it's an auto.