l have recently swaped my 305 for a 350 tpi in my gta, since it is a 5 speed car with tpi it should have work well. However it is only running on 4 clys. the right side, the left side are pulsing and there is spark. Could it be the injectors, or maybe l am off a tooth on the dist.? please can some one give me any ideas!

Check your fuses. There are two, one for each bank of 4 injectors. Also check your injector wires and make sure you dont have a short or an open.