Help with block ID 427-454

[Astock]

1973 289 casting. Factory 4 bolt,extra hole by the oil filter,and factory windtage tray. Pad reads: T0929EDM
I know that most books show a 289 casting as 2 bolt only,
but I have owned a half dozen 4bolts.
Thanks for any input. BTW,the casting date: G 10 72

[Mr70]

That 289 block has been found in both 2 & 4 bolt configuration.
I actually found one in a 1970 L-78 Chevelle,as a CE warranty engine replaced sometime during 1973.
If memory serves,EDM was a 1973 Checker Cab callout.

[Astock]

Thanks for the help, Rick. Unfortunately there is going to be more to this thread with pictures.

[RichSchmidt]

Thats a good block,couldnt tell you what its out of off hand,but they are just as good or better then the 512 blocks in terms of strength and bore thickness.