Honestly, I wish that I was interested in building a '66 Wildcat.
I think it would be fun to try my hand at rebuilding the interior.
I'm sure that there is another kit out there that has seats that are close enough to the Wildcat's to be used as a base.
The door panels might actually be fun to re-do.
The chassis issue is the same as any other '60s full sized GM product, especially the many Pontiac Bonnevilles produced by MPC and AMT from that era.
There are no suitable highly detailed chassis produced for anything from GM with a long wheel base from the mid to late '60s.
Steve