1969 ss 396 old race car bought it 20 years ago

[chevyman0429]

I crawled under this old beast yesterday to get the dated code off the center section to try and verify if the rear is possibly original to this car! Well I don’t believe it has a date cast into the back passenger side of the center section. The axle tube reads Kf. 0529 F
E
So that stamped date I think reads may 29 correct ? Would the date that’s usually cast into the center be some place else? My other Fremont built chevelle has it cast in the center section.