Changed from EFI to carburetor

I just put a 1984 engine into it and it has carburetor instead of this. I had put the distributor and oil pump shaft, intake and this off the 1986 engine onto it and it ran fine for few hours then sputtered and died and could not start it again. I think the injectors are clogged/malfunctioning so I put all the old equipment back on and I have gotten it to almost run a couple times, but now I cannot get any spark. Do I have to bypass the ECU somehow to make it work with carburetor or is there a way to clean out the injectors myself? I am on a very tight budget and I would appreciate any help. Thanks