Remember the 1969 Valiant 'body style'.
They were only available as a 2-Door Sedan or 4-Door Sedan.
The Sales and Marketing Division at Plymouth was not to keen on the idea of
Marketing a 2-Door 'Post' Sedan in late-1968 for the 1969 Model year.
If the Valiant 'Hardtop' was still in production in for 1969, then it might have
been a go.
The AMC Hurst SC/Rambler became available in February 1969, so it was
'technically' a mid-season 1969 1/2 Model.
I doubt as to whether the 'proto-type' idea for the 1969 Valiant would have had
the SC/Rambler 'Mail-Box' type hood scoop.
But, the proposal for the 'HV/Valiant' had some type of Air-Induction system.
I'm still digging on that one.