Old Race 340 Teardown

TT5.9mag said

I’ll add one more thing and break my own rule, “all” (see what I did there) X blocks were 59 degree blocks.

Lots of info here
R block identification

Click to expand...

Yes, good info. But it begs a question about my block. The "X" is cast into the driver's side bank rear (behind the flywheel) - not on the front of the right bank like described everywhere I've read. Also, there's no casting numbers on the block at all. There's only a small "4472" hand stamped near the pan rail on the right front. WTF?