Old engines can have death of a thousand cuts. I would power wash the complete engine first. Take care of covering up the alternator and coil. It's hard to track an oil leak if the engine has leaks all over. Even with dye it is not a 100% call. Keep in mind that your RMS will leak down and not...
You should remove and clean every ground points you can find. Around the engine bay you have a few. Remove your kick panels in the cab. You have a few there also.
Try the wiggle test with all the connections. Did you scan the PCM? If it is a flooded lead battery. Check the voltage at each cell...
What year truck do you have?
It is very easy to do the installation. The problem is that it will not start after. Even with the correct box code and calibration code, you still need the reflash. If Ford will install it and reflash it for $220.00, let them do it.
The main thing during a...