GM's Oshawa Ont. assembly plant never assembled the 1970 L-78,LS-6 solid lifter Chevelle.
The Hydraulic lifter L-34,LS-5 Chevelle,yes.
Canada did import already assembled L-78,LS-6 chevelles from the USA to be sold in Canada too.
BTW,if it crossed the canadian border,or was assembled in Canada,VVS has a record of it.
https://www.vintagevehicleservices.com/option-info