I'm aware of this, but then he could simply remove all of his 300-series
data, as none of these cars were regularly sold in the US, and almost
all of the data there is just wrong. 
Only few 300-series Volvos were
sold with the B19 engine. Most had Renault engines (B14, B17), some
around 1980 hat the B19, and starting around 1982 the "power" version
came with the B200. The last 340s were sold in the early 1990s with the
B14 engine.
