Odd 440 block pad markings?

[polkat]

The markings on my 1971 440 block read as follows:

G440
5 25 B(see below) C

I understand the G440 5 25 okay, but the B is backwards. It's my understanding that a regular forward B indicates .010" under crank journals, but what does the backwards B indicate? My main journals are standard, but my rod journals seem .010" under. Is this what the backwards B means?

Also what does the C indicate?

Thanks!

 

[Propwash]

Maybe this would shed some light on your situation Polkat..

http://www.moparengineswest.com/Stampings.htm

 

[polkat]

No, didn't show the B (forwards or backwards) or the C, but thanks anyway!