Slant Six engine numbers issue
F: 1970 model year
W: Engine built at Windsor, Ontario Canada
225: Engine displacement
R: Passenger car engine
L: Low compression ratio (for export to countries where the available gasoline had lower octane than was available in North America)
3066: Engine built on 19 December 1969
0643: Not relevant outside of factory
L: Dart
L: Low trim/price class
41: 4-door sedan
B: 198 cubic inch engine
0: 1970 model year
8: Vehicle build factory identifier—"8" is not within the North American factory network; given the body plate it would seem to indicate a Peruvian build plant.
178867: Vehicle serial number
So you have a mismatch between your engine's ID number and your car's VIN. Possible reasons for this:
• Different engine codes used in cars built in Peru/in cars built outside North America. Certainly wouldn't be the first time.
• A replacement engine
• A mistaken VIN stamp of "B" instead of "C" or "E". This happened plenty often in the North American plants, and we see an interesting double-stamp on the car's body plate, so that's not out of the question, either.
Either way, looks and sounds like an interesting car! Show us some more pics, will you?