George my 67 S is, but my 69 is a "plain jane" S....front drums lol.
So comparing to IMFURYS car would be difficult.
Not sure if it's been mentioned, but check but OP should check Hamtramck website out.
Well if your 69 is a very than most likely it has a sway bar. If it's not a vert nor a perf. Pkg car and has a sway bar than what I thought may be correct. That they all came with sway bars, just not the heavy duty one