Hi:
For your interest, I along with help from Sam Sox Jr. I wrote a 24 page booklet booklet detailing the career and P-51 Mustangs flown by Preddy. The book was published by Eagle Editions and also includes decals for his P-51's in three popular scales.
Included in the back of the book is a page dedicated to that final flight with eye-witness reports. It also includes a map that Sam provided me detailing the flight line and crash location based on the information available at the time.
The book is available at:
http://www.eagle-editions.com/preddy.htm
HTH
Mark Proulx