All, I recently installed a new Mopar cam and the correct mopar part number of valve springs along with new lifters. Basically I had a cam, in my opinion, had too much duration at 306 degrees. I went with a brand new mopar cam with the same lift and duration as the stock 383 HP cam that would have come in this engine back in ‘69. I degreed the cam and did everything by the book when installing. I also performed the break-in as directed using the proper break-in lube etc. changed the oil and filter after break-in. So we’re past break-in I hope. At startup now it runs smooth, no noise etc. After driving perhaps 30 min or so, returning to my garage I can hear a very slight valve-train noise but it only occurs after the engine warms. After it cools and I run it again, same scenario. Any thoughts on this? Adjustments, etc? I’m using 10W40 with a zinc additive as directed. Again, brand new cam, lifters and the right springs. Around 18 degrees of timing set according to vacuum and proper carb adjustment. She would pop through the carb at 5 degrees as directed by mopar. 18 seems to be where the engine runs best. I know these details have zero impact on the noise just adding detail here. Thank you all!!