S76 also had allison or trublemaker.
The 105 was metric up to the engine which was C20 ( or C28) for LS.
Only strange things I recall were the some of the fuel lines that were imperial one end and metric the other .
Same would apply to the Bk117 with LTS and the D version of the AS350 not to mention the US coast guard Dolphins , EC135 Pratt version AB139 A109 and A119 which all have US engines in Euro airframes.
I guess the mechs must have to have extra large tool kits.
Do cannon plugs come in metric and imperial sizes ?.