If you’re referring to the GTX that one apparently has the hemi ,426 /425hp dual quad carbs . Only 209 produced in 1969 with that engine option. Rare beast .I asked because they also had (I think) a 383 V8 version of just about everything "muscle" they made back then.
I thought they put the engine displacement badge on the hood along the centre line, both sides?
Couldn't quite make one out in the pic.
https://www.musclecarfacts.com/plymouth-gtx/46-1969-gtx/:heartspop:


