Hard starting 360 magnum

It's just that, hard starting. The fuel pump is good but after setting overnight it acts like it doesn't get fuel. I crank it over about 10 different times, turning the key off inbetween, and hear it pressure up everytime. It gradually starts to hit until it does a rough idle. The rest of the day it's OK unless it sets for too long. 98,000 mile 1996 2500 Ram p/u.Thanks in advance.