* Rich and developing nations disagree on reform proposals

* Western delegations unhappy with conference organizers

By Louis Charbonneau

UNITED NATIONS, June 19 (Reuters) - South American left-wing firebrands Hugo Chavez and Evo Morales are among the few heads of state attending next week's U.N. meeting on the global financial crisis, a U.N. spokesman said on Friday.

In addition to Venezuelan President Chavez and Bolivian President Morales, the leaders of Ecuador and Serbia, vice presidents of Iran and Zimbabwe and a Russian deputy prime minister will speak at the conference, U.N. General Assembly spokesman Enrique Yeves told reporters.

Most industrialized developed countries are sending much lower-level delegations to the meeting, which Western diplomats told Reuters was a reflection of their dissatisfaction with the way the president of the General Assembly, a leftist former foreign minister of Nicaragua, has organized the meeting.

The official purpose of the June 24-26 conference -- billed as a "summit" -- is to discuss the impact the financial crisis has had on the developing world and to agree on proposals to reform the global financial system.

Western diplomats have complained that assembly president Miguel D'Escoto Brockmann, a Roman Catholic priest who was in Nicaragua's Sandinista government throughout the 1980s, has tried to use the upcoming conference to put capitalism on trial, an allegation his spokesman has flatly rejected.

They also said they expected participants like Chavez and Morales would use the conference -- which U.N. officials and diplomats say will have no decision-making powers -- as an opportunity to rail against free markets.