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What you using for tranny n rear end gears.My best friend has a 69 Corvette with a 600Hp 427cu inch built n 4 speed Muncie with I think 3:96 gears.Damn thing needs a parachute LMAO
The transmission is a 4L80E built for 1000hp, with a Ford 9” 3:70 posi traction.