Check for vacuum leaks first, make sure all the clamps and such from the MAF are tight, 24lb injectors suck, that could be the problem, are your 02's in good shape?, MAP sensor good?, check and make sure the PCV valve didn't pop loose, is the vacuum line to the fuel pressure regulator connected, SPOUT connected? Do you have a 160 stat? get rid of it! Throttle position sensor set in the proper range?
Check timing, set to 10 degrees.
Overall, I think it's a vacuum leak
Good luck, hope this helped