[tempfixit]

My opinion of the engine/tranny oil leak it is not severe at this point and I would monitor it.

I would tend to the camshaft sensor, you may want to consider getting the syncronizer also so you do not need to to the job twice. If the original sensor was installed with rebuilt engine, syncronizer may also be defective.. If I remember correctly the camshaft sensor tell the ecm when to fire the injectorss. (Soneone correct me if wrong,)

I don't remember if you installed a new fuel pump with gas tank ot not, but have you tried priming the fuel system before starting to see if it makes a difference in starting?? Key on for 5 seconds, then turn key off, wait 30seconds or so and turn key to prime fuel pump again, wait a little then see how it starts.

Check the water pump area for leaks, was a new water pump installed when rebuilt engine installed???

Do a coolant pressure test to see if coolant leak can be located>