440 casting number questions (maybe 440-3)

OK here is what I have I just bought a 440 and 727 last night. I starting tearing apart and here are the numbers I have.
Block: 253643010 with C440 on the front left side
water pump: 2863047
heads: 2899943
intake: 3671276

Is this a 440-3 or regular 440. It looks like the heads and the water pump connect. If I change heads will I still need the type that the water pump hook up to or will regular heads work?
Author: admin