Does this number mean anything?

This number is the engine's serial number (not to be confused with the partial VIN on the passenger side)

F - Series (model year) 1970

W - Windsor Ontario, Canada - Engine assembly plant

340 - 340 CID

P - Premium fuel recommended

3225 - Engine final assembly date from the 10,000 day calendar - May 28, 1970

0203 - 203rd engine completed at this plant on the date above.