B767-200 TAXIES TO WRONG RWY AT ATL. TXWY SO CLOSE TO LNDG RWY CAUSED ACFT ON FINAL TO GAR.

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GND CTL CLRED US TO TAXI ON TO TXWY 'D' HOLD SHORT OF ACTIVE TKOF RWY 26L THAT THEY WOULD USE 26R BECAUSE WE HAD A SLOT TIME. AFTER XING TKOF ACTIVE RWY 26L WE ASKED IF THERE WOULD BE A DELAY OR WOULD WE BE GOING AHEAD OF THE LONG LINE OF ACFT WAITING TO TKOF ON RWY 26L. THEY SAID TO HURRY ON DOWN AND THEY WERE GOING TO BE READY TO CLR US FOR TKOF AS SOON AS WE GOT TO THE END. WE IMMEDIATELY STARTED THE OTHER ENG AND RAN OUR CHKS - I SOMEHOW 'LOCKED' ON RWY 26L AS OUR TKOF RWY. AS THEY WERE LNDG ON RWY 26R AND PASSED THE TKOF END OF RWY 26R. ON MY WAY TO RWY 26L BEFORE I REMEMBERED GND CTL HAD SAID RWY 26R FOR US FOR TKOF. THE CAPT ALSO CAUGHT IT AND REMINDED ME. THIS SECTION OF THE TAXI IS SO CLOSE TO THE APCH PATH OF RWY 26R THAT IT CAUSES A CONFLICT OF CLR SPACE WHEN A HVY 767 IS ON THIS TXWY. TWR ALSO NOTICED OUR ERROR AND HAD TO SEND 1 ACFT ON FINAL; AROUND. TWR QUICKLY CLRED US FOR TKOF ON RWY 26L TO RESOLVE THE PROB FOR OTHER LNDG TFC. MENTAL ERROR WAS MINE; AS I LOCKED ON RWY 26L AS THE TKOF RWY; AND WAS PLANNING MY TAXI ACCORDINGLY UNTIL IT WAS TOO LATE. WE WERE NOT AWARE THAT THE TAIL OF A 767 WOULD CAUSE A CONFLICT IN CLRNC WAY OF RWY 26R WHEN ON TXWY B; E END. CLBING N.