Do you know anything about this 383 Duster?

Last summer we bought her from a gentleman in St. Augustine FL. We suspect the car might have a history around Jacksonville FL since the driveshaft was shortened by Drive Line Service on Commonwealth Ave there. Current color is very recent dark purple but was red before that and light green originally with a 318. Engine is 383 with 727 manual valve body trans and 489 SG. Car has a fuel cell, battery in trunk and frame connectors. The rocker arms are Crane gold rollers and the headers are Hooker fender fender exists. We would like technical info (like what converter, compression ratio and cam specs (it has a purple shaft). Any race history, leads to former owners and e.t. info would be appreciated. Thanks for responding, Ragnar in Iceland.

Duster 7.JPG

Duster 9.JPG