I was under the impression that when Korolev and the N-1 were greenlit, the UR-700 the RD-270 had little more funding other than to keep the programs on life support and not be cancelled, but no real development until the N-1 was tested, then a need for a real backup program got some more funding, till the Soviets gave up on the Moon, and ended the RD-270, UR-700 and N-1 programs.in 1974 with funding cuts, and officially killed in '76No, the RD-270 program ran from 1962 until 1970, Glushko made 27 engines test
and the engine show combustions instability, he could have solve that problem had program went on.