2002 Dodge Ram 1500

I put in a refurbished 4.7 about a month
and a half ago. I ran through the
instructions as far as breaking it in. A
couple days ago I got off the freeway and
found that it was making a ticking noise
that doesn’t go away. I replaced the
exhaust manifold gasket yesterday. It still
ticks. The tick is loud enough to turn the
heads of people on the street. Hoping it’s a
lifter and nothing deeper in the engine. Any
ideas?