I have a interesting one. I have done tons of reading but the opinions vary greatly. Anyone that can help please feel free.
A friend of mine bought a 428 from ford in the early 70's. He still has the recept showing 428. He put it in his truck and ran it until last year. He then removed it and sold it. The motor was never
rebuilt. He recently sold the motor. The guy that bought it (2 months ago) just contacted him and is not very happy. He claims the motor is a 390 at 40 over.

Here is the numbers we saw on the motor before he sold it.
c6ae on the connecting rod bearing caps
UA on the crank ( the new owner says he sees a 2 in front.)
c8ae-h on the heads
2e31 oil filter housing area
352A back of motor
53 back of motor
252618 back of motor

This was bought as a 428 from ford ..... can anyone help???
What is up with this ?? Thanks for any information !!