The heads of the Civil Service Commission and of the Office of Management and Budget will get an eyes-only report today from the task force that is designing a new system for handling the government's top managers.

Although the document is being kept secret pending CSC-OMB review and approval by the president, indications are that it will not be as tough nor will it delve as deepluy into the management bureaucracy - as some tough political operatives wish. It should however provide some relief to nervous federal managers who fear major changes in their job status, pay system and tenure.

Officials who will get the report today have asked that the task force - headed by Dwight Ink - send over drafts covering various phases of management changes as they are completed rather than waiting for a single package on the complicated, and controversial subject.

Ink is a former AEC, OMB, HUD and General sservice Adminstration careerist who is heading the Personnel Management Project. It is studying all phases of the government's people-managing system. Aides said that Ink-s staff met earlier this week with CSC and OMB brass who got a briefing on the proposals.

Carter aides want the task force to design an Executive Management Service that will give the President and agency heads greater control over who they can hire for key management jobs. THey also want more say as to how those managers are paid, given greater authority to transfer, and also to get rid of top career aides who don't mearsure up.

Because of the important assigned federal management by top carter peopel, some key advisers would like to extend that control down through Grade 14 of the civil service, and to put people in the EMS under contract to agencies. There are more than 82,000 federal workers in Grades 14 through 18. Many designated as "managers" would be brought into the EMS - taking both the benefits and the risks of service.

But insiders believe that the task force is heading toward recommendations that would limit the EMS to Grade 16, 17 and 18 workers - the so called "supergrades" - and is definitely against the idea of contracts between agencies and employees.

Top officials of CSC and the OMB can modify or ignore the task force recommendations before sending them on to Carter. But insiders believe they would be reluctant to move very far against the task force proposals since they reaction will be a tipoff as to the representative thinking of the career bureaucracy - and the political realities of getting the EMS plan through Congress.