When I give my car gas, and start to rev it, it kind of misses real bad. I mean for example from 2k to 2.5K its like the motors not doing anything then all of a sudden it catches. It could be a miss or something. Its also fowling out the plugs with fuel.

It was throwing 02 sensor codes, coolant temp sensor code and i replaced both and same problem still. When I first put the motor in, it ran fine for 20 miles. Then started doing this off and on, then now all the time. Sitting here thinking, Ive been changeing my spark plugs so much I do some of them finger tight. But I dont think i leave them loose enough to miss. But still.... I am very frustrated with this car. Any ideas? No trouble codes anymore.

I did have it tuned, I thought it may be a bad tune from the bad 02s and coolant temp sensors but i installed the stock tune and the problem is still here. tomorro, im swapping my fuel rail with a friends to see if the stock fuel pressure reg is messed up by chance, along with a new set of plugs.
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This belongs in LS1 engine Tech... I'll move it there.

You might want to provide a little info about the specific mods to the stroker, the tune, who did it, injectors sizes, cam, etc.