Billy Dunk and Ted Ball, two of Down Under's top pro golfers, will tee off one day next April at the Ceduna Golf Club in South Australia, with a mechanic, a doctor, an army logistics expert and Ball's wife standing by.

And, oh yes, a Guinness Book of Records official.

Dunk, 43; Ball, 42, and assemblage will be off to play a 1,597,550-yard, one-hole course, traversing some of the continent's harshest terrain and concluding on the 18th green at Kalgoorlie Golf Club in western Australia.

"I reckon Dunky and I could do it in 23 days, although it could take as long as 30 days," Ball said of the projected venture in which, between shots, the pair will ride special three-wheel trail bikes (liftable over fences).

Free drops near sleeping snake, kangaroo or buffalo, or off sacred aborigine ground. Par for the 908-mile route: 7,173 strokes . . .

NFL: Eyebrows rose when the champion 49ers waived starting linebacker Craig Puki and traded starting nose tackle Archie Reese. Now Puki, claimed by St. Louis, admits he volunteered in April into four weeks' drug rehabilitation; used to do cocaine "and a few beers" but "never on Friday, Saturday or Sunday before a game." And, he says, he has been "clean" since his clinic stay. San Francisco Coach Bill Walsh says Puki was cut for ongoing personal problems--not drug-related; like, missing precamp physical . . . And Reese, traded to Kansas City, has flunked Chiefs physical, nullifying the deal. Says a 49ers spokesman: "He's in a state of limbo" . . . Date for Don Reese hearing on charges of violating probation, says the Florida prosecutor's office, indefinite; probably next week before the former NFL lineman/admitted cocaine dealer is summoned into custody . . . First-string guard Henry Sheppard quits the Browns, in favor of his Cuero, Tex., ranch and his computer service. Sheppard gained some notoriety two years ago in NFL training by studying karate, declaring, "Pass protection, in some sense, is hand-to-hand combat" . . . Sure enough. Green Bay's No. 1 draftee, offensive lineman Ron Hallstrom from Iowa, has broken in with a broken nose--punched by linebacker Kurt Allerman in a skirmish during contact drill . . . Another Cardinal acquisition: defensive end Elois Grooms, 78-game Saints starter displaced by newcomer Bruce Clark . . . Wallace Francis, Falcon receiver waived after refusing to play for Atlanta anymore, tells the Patriots, who claimed the nine-year pro, never mind. Francis, 30, says "My desire is to play for the Lord." He is entering the ministry.

Atlanta Braves Manager Joe Torre, benching Claudell Washington, cites "personal problems, not related to baseball . . . making him tense. He's been pressing. You can't play that way" . . . First Roberto Duran, and now Gerrie Coetzee, the South African heavyweight (WBA's No. 4), makes America his home for "as long as it takes to win the world championship" . . . Wave of the present: At Charles Town, women jockeys won the first seven races on Saturday night's 10-race card; four by Carol Bradshaw, meet leader with 24 winners . . . Ray Fitzgerald, 55, the Boston Globe's prize sports columnist, died yesterday; lengthy illness. One of the best.

Lee Trevino's recurrent back trouble has forced him to forgo the PGA Championship in Tulsa this week.

Sam Bowie, Kentucky's junior-to-be basketball center: maybe. The fractured left leg that kept the 7-foot-2 pro prospect out all last season has developed "troublesome swelling" and a second cast has been applied.