The engine swap was not because of waranty work the 2nd owner bought the car off of guy that died while building the Sears Tower with only 500 miles on car then took it to Nickey to have engine changed out to start racing the car. When he sold the car to 3rd owner he kept 427 and transmission and other stuff to put in a Camaro to race at the tracks and 3rd owner put another 427 back in to race which I have paper on also along with notarized letters and old bill of sales notarized also registrations.