Heres the 800 DPer. 6910, It has Annular boosters in back.

http://www.ebay.com/itm/Rebuilt-Holley-H...df6&vxp=mtr

75 Duster, 451 10.87 @ 123.58 NA 97 Z28 6sp., 12.01 @ 115 on a 100 shot 71 Swinger. 360 magnum. 12.58 @ 105 78 cutlass, 469 BBC. 12.70 @ 108 on street tires. http://www.youtube.com/watch?v=Z2kqNmMfheU