Pancho Carter, whose father, Duane Carter, finished fourth at Indianapolis in 1952, won the pole yesterday for the May 26 Indianapolis 500.

The surprising duo of Carter and Scott Brayton, driving March racers powered by experimental Buick V6 engines, led qualifying on a record-setting but slower-than-expected first day of time trials.

Carter, 34, a 12-year competitor at Indianapolis Motor Speedway, had a record four-lap average of 212.583 mph. Fourth-year man Brayton was next at 212.354 and set a one-lap record for the 2.5-mile oval, 214.199.

Both those runs came early in the day. As temperatures moved into the low 80s and wind began gusting up to 20 mph, most of the 27 drivers who completed legal qualification runs were disappointed with their speeds.

Carter and Brayton were among nine qualifiers who broke Tom Sneva's year-old four-lap mark of 210.029. Carter earned $77,500 for his pole victory.

The last time a car powered by a stock-block engine won the pole position was in 1931, when Russ Snowberger qualified a Russell 8 at 112.796 mph.

The owner of Carter's Valvoline-sponsored car, Rick Galles, borrowed an engine from Doug Shierson's team after they decided their driver, Howdy Holmes, would go with a Cosworth engine because of fuel flow problems. Holmes qualified at 206.372.

Bobby Rahal's March-Cosworth earned the outside position of the front row at 211.818. The second row will have Mario Andretti and teammates Emerson Fittipaldi and Don Whittington. Whittington had an unofficial track-record lap of 214.643 in morning practice . . .

Danny Fair of Hoadley, Va., won the 35-lap late model stock car feature last night at Old Dominion Speedway in Manassas. Fair, in a Chevrolet Camaro, passed Curtis Markham of Richmond on lap 25 after the two had run side by side for five laps . . .

Ronnie McBee of Harmons, Md., drove a Camaro to victory in the 30-lap feature race at Dorsey (Md.) Speedway. McBee's win was his second consecutive at Dorsey and his third of the four-week old season. Jimmy Skinner of Laurel, driving a Camaro, finished second.