1991 Ford Bronco Changing an ECM

I currently have a 91 Bronco Silver Anniversary with a 351W and E4OD. I believe my ECM went bad and believe me I have done all the usual troubleshooting. I found a 92 Bronco XLT with 351W and Trans (Auto - but not sure which one) unknown at this time. Located in the bone yard. I pulled the ECM from both Broncos, my ECM has a P/N F2TF-12650-DA and the ECM from the Bone yard is P/N F2TF-12650-CB. I know mine has Calif. Emissions and it looks like the other one is for Federal Emissions. My question after looking at the wiring diagrams and seeing only minor differences is, will I totally be in bad condition by putting in the new ECM? Currently my Bronco will not start and my Fuel pump runs whenever the key is on. The fuel pump relay has been replaced. Fuel Pump is supplying 40lbs pressure but the engine will not start.