Hi Ed,
Actually owned an 1967 Mustang. Got me hooked on V8-engines and it all started to go wrong there

Didn't like the 'roughness' of the Ford design and swapped to the German stuff. Was dead cheap when I started, not anymore...Nowadays a decent V8 S-class is just about as expensive a a decent 1965-68 Mustang.
Like lugers, they tend to grow in value