I was wondering if anyone could shed some light on identifying my boaster for my car. It's a 440 six pack with power disc. From what I've read the two part numbers that should be 2944490 and 3420987?

The only thing that comes close to this on my booster is 294498L9?

Please let me know is what I have is correct? It appeared as if had never been changed, but given how old the car is anything is possible.