I got everything tightened up and is sound like its coming from the front cylinder. I believe it does have adjustable push rods. And advise on how I should proceed?
It's impossible to diagnose a sound remotely like this. It's a moderately informed differential diagnosis at best. Does the ticking, clicking, whatever it is change with engine speed that you would associate with valve train? If so look there.
It could still be anything from a cracked piston skirt, to a rocker tip, to a lifter, to a bent push rod, to an exhaust heat shield, to too many other things to list. Hopefully it's simple. Hopefully it is easily and inexpensively found. You're still just got to start isolating the sound and eliminating potential problems. Start with the easiest / cheapest stuff first and work out from there.