Does anyone have or know where to find the factory cam specs for different m117/m116 engines? 3.5,3.8,4.5,5.6? Im also trying to find out head differences between different engines including us vs euro of the same numbers. I have found some info on the 117.982 and 117.985 us and euro, strange thing is that the us and euro .985 and euro .982 share the same heads according to EPC, but us .982 has a different part number. i believe the .982 is d-jet and .985 is k-jet. I have seen pics of two different shaped combustion chambers and there are multiple piston top designs i know. i k now the 3.5 m116 heads will increase compression significantly. I'd love to have a set of them.