ELECTIONS / LOCAL CONGRESSIONAL RACES : Beilenson Treasury Dwarfs Rival’s : Reports indicate Tom McClintock has made a strong showing in fund raising during the final weeks of the campaign.

Democrat Anthony C. Beilenson’s campaign war chest contains more than twice as much cash as Republican Tom McClintock’s as the candidates head into the crucial final days of their race for a new congressional seat centered in the San Fernando Valley.

McClintock, a conservative assemblyman from Thousand Oaks, raised $63,675 between Oct. 1 and Oct. 14--more than twice as much as Beilenson, a liberal Los Angeles congressman, who raised $31,529, according to federally required campaign reports released Thursday.

But Beilenson reported $229,233 in cash on hand--more than twice as much as McClintock, who said he had $95,448 available as the candidates dash toward the finish line in the Nov. 3 election.

Beilenson and McClintock are locked in what political handicappers consider a tight race in the newly created 24th Congressional District, which runs from Sherman Oaks to Malibu and Thousand Oaks.

In the adjacent 25th Congressional District, front-running Republican Howard P. (Buck) McKeon continued to far outstrip two challengers in fund raising, campaign reports said. More than three-fourths of the $46,119 McKeon banked came from special-interest groups representing car dealers, dentists, developers, cattle ranchers and others.

Money is critical in a campaign’s homestretch because it is needed to bankroll mass mailings, precinct-walking operations and phone banks used to call thousands of potential voters.

McClintock reported raising $29,750--nearly half his total in the two-week period--from special-interest groups, including those representing oil companies, banks and the National Right to Work Committee, which opposes unions.

His biggest single contributor was the National Rifle Assn., which has given him $9,990 this year. Former Lt. Gov. Mike Curb, the owner of a Burbank music firm, gave him $1,000.

Beilenson, who has long represented parts of Los Angeles’ well-heeled Westside, received money from lawyers, environmentalists and entertainment-industry figures, including “MASH” television star Wayne Rogers and writer Ross Thomas. The congressman also received $1,000 from Rep. Don Edwards (D-San Jose), one of the most liberal members of the House.

Beilenson continued to heavily outspend McClintock. He paid out $63,581 in the two-week reporting period, including nearly $30,000 for direct-mail brochures.

McClintock said he spent $34,2484, including $1,000 to Dan Morgan, a Virginia political consultant who solicited contributions for McClintock from more than 500 special-interest political action committees, or PACs.

The Democratic nominee in the 25th District, Santa Clarita lawyer James Gilmartin, banked just $364--a tiny fraction of the $46,199 McKeon raised.

But Gilmartin had more than three times as much money on hand as McKeon: $62,176 versus $18,216, campaign reports said.

McKeon, a conservative, reported that $36,200 of the money he banked--or 78%--came from special interests. The donations included $5,000 from car dealers; $5,000 from home builders and $4,950 from the National Rifle Assn.

McKeon also paid $1,000 to Morgan.

A third candidate in the race, independent Rick Pamplin, a Ross Perot supporter, could not be reached for comment.