Died while driving

Alright so I just got this vehicle a few days ago I do not know to much about 318s or a whole lot about Dodge in general. But it was getting chatty (ticky) and the oil was black so I thought well might as well get an oil change. And the truck was driving fine prior to all of this. So I go and get a oil change went well and they poured water around the oil filter because I guess there was a good amount of oil around it when it was taken off spoiled. So I thought nothing of it. I leave and get on the highway and I drove maybe a mile after getting the oil change. And I stepped on the gas a bit while on the highway and it just died on me. I swapped batteries thinking maybe it was the alternator because with the other it would not crank. And with the newer battery it cranked a little but would not start. So I am thinking possibly the alternator but I did notice it was still a little (not near as bad) ticking but maybe the alternator? I cannot figure it out have not gotten to look everything over yet and I need some advice. Thank you.