In general, Nixon's policies on social issues were acceptable to what we would now call movement conservatives or true conservatives while his economic policies were not.
Nixon's social policies were centered around his idea of the silent majority that wanted traditional values and tended to be from the white working class. For this group, he did things like refusing to enforce court orders relating to desegregation. He campaigned on a law and order platform and launched a war on drugs. These were things that conservatives could agree with.
But Nixon was not conservative enough for the right wing when it came to economics. His creation of the EPA and his wage and price controls were examples of a lack of conservatism in his thinking and his policies.