I have to check on the exact date but (I think 1969-70) the original engine failed, Al said the oil pump pick up came loose and the engine starved of oil on the 401...............dead duck. Under warranty GM put a new W31 short block in the car, that is what is in the trunk.
Al said when they ordered GM Vintage services paper work the person knew the car had had a warranty engine replaced. I will follow up on this to get whatever documentation can be provided.
The trunk pan and floor pans look very solid. I have yet to look really closely:-)
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1969 Beaumont 350 Auto White Sold
1969 Beaumont 307 Auto Green Sold
1969 Chevelle SS 396-L35 Auto Blue Sold
1969 Oldsmobile Cutlass 'S' Sports Coupe W31