A lifter noise is more of a sharp click. Ever hear a car with solid lifters? ( Like an old Chrysler Slant 6 , Ford Mustang / Ranger with 2.6 / 2.8 German V6. )

A worn out connecting rod bearing / crank shaft journal generally makes a knock at first start up then gets quiet once oil pressure builds up. As the oil warms up / thins out / pressure drops off a quick idle to 2000 - 2500 RPM to idle throttle snap ( in park / neutral ) will bring the noise back. There is no need to rev the engine to red line or for any length of time, what you are looking to do is a quick "get the engine to work under the load of acceleration".

You need a shop that builds engines to listen to this.