1966/67 barracuda bucket seat interchangeability

I was wondering if anyone ran into this or has any information that could help me. I am getting close to putting in the interior in my 1967 barracuda.

I have a set of bucket seats from 69 barracuda and a set from a 1966 barracuda. The ones from the 1966 have hard backs with chrome molding which I really like and the 1969 have been recently reupholstered so they are nice. I see brackets are significantly different.

Here are my questions:

1. Would the hard backs and side trim on the 1966 buckets fit on 1969 frames?
2. Are the tracks on the 1967 easily modified to fit into 1967-1969 barracuda? - looks at minimum one side would need to be raised.
3. Would the best route be to take 1969 tracks and put them on the 1966/67 seats?
4. Has anyone played with any of these changes and what problems did you run into?

The 1966/67 hard backs have chrome trim and look really cool/classy in my opinion. the 1969 have center emblems that look really nice and have nice upholstery and I could just put them in w/o any problems. the 1967 will need to be re-done but appear to be nice other wise (have not yet received these). If I am able to put the hard backs and trim on the 1969 seats I would have best of both worlds - if possible

Thanks in advance if you have any information that will help.

Best regards,

Bryan