Can anyone decode this engine?

3: 1973 model year
W: Windsor engine plant
225: Self explanatory
4330: Engine assembled on 5 June 1973

The stamping at the rear would match the latter part of the car's VIN if the engine were original to the car.

Since we're talking about the VIN:

L: Dart
L: Low trim/price class
29: Fastback (Dart Sport)
C: 225 engine
1: 1971 model year
B: Built at Hamtramck (or if that's a D, at Belvidere)
136582: Vehicle serial number