Fresh 360 Valve Train Noise.....

Like a Castrol GTX 10W40? If you could be more specific on the Castrol type and weight, we could be sure.

Look on the back of the bottle at the circular symbol, and see if it has the letters API-SM or API-SN in it. These SM and SN oils have had the ZDDP content reduced down to the 800-900 PPM range, and flat tappet cams with any sort of heavy springs are going to need the older ZDDP levels of 1200-1300 ppm minimum to preserve the lifters, or have an additive used.