Canadian 340 block 0R244472 (SSM area?)

I'm looking for the original engine block for my '70 Swinger, which was sold new in Canada (Y07). I know the car was in the Sault Ste Marie area in the late 1990s, and again about 10 years later. I don't know when the engine and chassis parted company, but I first saw this car in '01 and believe the block was in the trunk. The numbers transmission was disassembled in the back seat floor in 2001, and remains there to this day. The car is factory M3 Panther Pink, which might jog a memory or two. If it rings any kind of bell, help a brother out.