Installed new stroker, won't run right, Help!!

[Blaster]

I just finished installing my new 331 tonight, everything went pretty good but the car now won't idle very good, requires stepping on the gas alittle to start (not like before),hunts for idle and it also dies sometimes after quick deceleration. The check engine light also just came on and won't go away. We played with the timing (it seem's to like 13 degrees, and the fuel pressure is at about 41psi (we tried 48psi but that was terrible). I also installed a new pro-M mass air meter w/matching motosport 24psi injectors. I have not installed the new fuel pump yet. The vacuum lines look to be installed properly, and I took my old chip out of the CPU which is now back to stock until I can get back to the dyno for tuning after break-in. Any idea's??? My 1991 GT started like dream before and the e-cam had a nice tone( I re-used it in the stroker). Now the car kinda sucks and is a hard starting, crappy idling, miserable mess. Help!!!