I have been pondering pulling my 6.2 to freshen it anyway and I was offered a running 6.5 NA out of a 99 P30. It has the truck style heads and intake and a 2931 pump. I am assuming since the engine has a newer casting number than the truck (nov of 2000) it has been replaced at some point. I know this would be a guess but stock did these engines have the higher 6.2 compression? Are the injectors the same as the turbo 6.5 with a lower pop pressure? Do all 506 blocks have piston squirters or only the turbo charged versions? I plan on pulling it down and inspecting everything and hopefully be able to add rings bearings, new head gaskets and studs and replace my 6.2 in my 82 K30 with a hx35. If it needs to be bored I will drop down to the 6.5T pistons. I have done some searching but actual specs seem hard to find. Thanks for the help guys.