I'v used about 4 of Kenny's converters over the last 10 yrs., Tried a couple different brands in the last couple builds & wasn't happy, the flash stall was always off... I went back this last time with PTC for my BBC, His converters are top notch IMO & his prices won't bust your wallet.

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