From my point of view this is not possible.
Index = FCustomThunkTemplates::Array_Find(TransformArray, Location);
Location and Transform Arrays are Ftransform and index is an INT.
There is not much information on “FCustomThunkTemplates” but if it does not offer a a conversion option you cannot convert these to your INT Index .
Smart thing to do is try at least a different aproach, turn your int variable into an int array and maybe since they are all arrays it will convert from array to array.
FCustomThunkTemplates, so I don’t think this is a conversion function, the math library converts things.