Two favorite targets of organized conservatives -- Republican National Chairman William Brock and Deputy Central Intelligence Agency Director Frank Carlucci -- are in line for high-ranking positions in the Reagan administration, according to well-placed sources.

The sources said that Brock would be named special trade representative, a post that currently carries Cabinet rank. It is not clear that the position will retain that status, however.

Carlucci, one of the enduring veterans of federal government service, is scheduled to be appointed deputy secretary of defense. He was the personal choice of Secretary of Defense-designate Caspar W. Weinberger, for whom he served as deputy secretary of health, education and welfare in the Nixon administration.

These sources said that President-elect Ronald Reagan also will name his transition spokesman, James Brady, as White House press secretary, and that William P. Clark, a California Supreme Court justice who was Reagan's executive secretary when he was governor, has been asked to be the deputy secretary of state.

Brady had been on the Reagan list for weeks as administration aides sounded for the position. At one point Brady was depicted as less than the first choice of Nancy Reagan, who reportedly wanted her husband to choose someone "better looking" for the job. She denied that his was her view.

Yesterday, however, a note was left on Brady's desk: "Since we couldn't find anybody good-looking, congratulations."

The objections to Brock and Carlucci were more ideological.

Carlucci, a career Foreign Service officer who once was stabbed while rescuring a group of Americans from a Congolese mob, was described in a recent staff paper prepared for an organization of conservative Republican senators as "an obstruction, rather than an asset, to Reagan interests." He has served in a wide range of postions in five presidential administrations, including ambassador to Portugal under President Ford. President Carter named him to the CIA post in 1977.

The major conservative objection to Carlucci, as stated in the staff report to be senators, was that he gave "active support" to a Carter presidential order that "enormously restricted intelligence collection."

But Carlucci's supporters, among them Weinberger, see him as kind of a governmental man for all seasons with an enormous range of expertise that he will put at the disposal of any president.

Brock's difficulties with the right wing of his own party are of long standing, stemming especially from his refusal as GOP chairman to allow party funds to be used for opposition to the Panama Canal treaties, an issue that split both Democrats and Republicans.

Last June, after Reagan had locked up the Republican presidential nomination, an attempt was made by GOP conservatives to remove Brock from the party chairmanship. The effort ended in a compromise in which Brock remained as chairman but Drew Lewis, a Reagan political operative who now is the designee for secretary of transportation, was made the operating officer at the committee.

Sen. Paul Laxalt of Nevada, one of Reagan's closest and most influential friends, said yesterday that he had recommended Brock for the special trade representative position. Laxalt and Brock were adversaries on the Panama Canal issue but have since patched up their differences.

Brock is widely regarded among many factions of the GOP as having performed effectively as party chairman in an election that exceeded even the most optimistic Republican expectations.

Clark, in San Diego for the swearing-in of a county supervisor, acknowledged that he had been offered the State Department post but said he had not decided whether he would take it. He is known to be concerned that resigning from the California court, often a trend-setter among state judicial bodies, would cause a liberal shift on the seven-person court, to which California Gov. Edmund G. (Jerry) Brown would name the replacement.

The choice became even more difficult yesterday when Justice Wiley Manuel, a moderately conservative Brown appointee who sometimes sided with the conservative Clark on criminal justice issues, died in Oakland after a long illness. Clark's resignation would leave the court with a single conservative member.

But there was, nonetheless, a strong belief among Reagan intimates that Clark would accept the Reagan administration post despite his lack of foreign policy experience. Reagan looks upon Clark as one of his most valued aides and waived his normal consultation with the bar on judicial appointments to name Clark to the court.