Possible head/valve problem

[Chamberpains]

Don't know. It was a long block so it came fully assembled and I was 600 miles away from the shop that put it in. It wasn't until the 2nd month of getting screwed around that I took my tools on down to Tennessee and took over the guys shop to finish my truck up. By the time I got there they already had it banged up and shoved in the frame and transmission attached. I basically got it finished up and fired off after 3 days and have been pulling everything they did back apart and doing it right since.

All I know is the new serial number on the valve cover starts with an LB, it was assembled 2/17 and cummins quickserve does not recognize the number at all. The head has a serial number written with a welder so that's the give away that its a reman head. I'm probably working with a Frankenstein time bomb.