Looking forward to seeing this project get completed. I have the same car (340 4spd) in same color and would be nice to see with the shaker. I want to do the same to mine. Wish I could do the rear window treatment but I have no vinyl top.
Car is looking nice!

67 hemi GTX silver 4spd, 70 cuda convert 340 4spd, 71 cuda 340 4spd (Curious Yellow, white billboards/interior), 70 Mr Norm's Challenger 440 4spd