Welcome to you Kenneth.
The LS code is a 1969 Impala 427/425 HP w/TH400 Tonawanda assembled on Jan.21st 1969.
CON VIN declares it as a 1969 Oshawa Canada built car.
This is Not a COPO Vehicle at all,but a Regular Production Option,but only 546 RPO L72 passenger cars were produced that year.Still a Very Cool engine.
Have you done a VIN search for that vehicle?
Also try posting this on
impalaSS427.com
Also try contacting George Z. at GM's Vintage Vehicle Services
HERE