What does it take to drop the pan ? 10hrs.? NOT! would these guys not clean their oil pan? Would these techs. put your used engine oil in their engines?
You should NEVER install old lifters on a new camshaft. Also, there is a cam assembly lube you would apply to the cam journals,lobes and lifter foot (bottom) when reassembling the parts.
For your own peace of mind, you should change the oil every ride until you are satisfied there are no metal partices in the oil.