I did my own version of Assassin bars here in Brazil. Works very well with OEM leaf springs. Got 1.50 60ft. Right now I've changed from OEM leaf springs to Calvert Monoleaf. So far on street works fine... Let's see on the track if I can drop 60ft. I hope so... smile

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'77 Brazilian Dodge Charger R/T - Street Car
Footbrake, Pump Gas, SB Mopar 360" N/A
3300lbs, Leaf Spring + Assassin Bars
Best 1/8 mile ET
1.50 60' / 4.31 330' / 6.73@102.54mph