No, 3 in the tree manual in the car originally. It is a TKO 600 behind a 408. Didn't need the extra torque capacity of 6 speed.
With 3 speed, no issues with previous shifter location or consoles. All and more of original trans hump had to come out and then rebuilt with new trans supports. Gets a little tight underneath with TTI headers and such. Had to go with mini starter which I am not happy with on hot starts. Didn't buy one of the aftermarket installation kits so had a few trips to machine shop and a few other component returns to get everything working right.