what do i have here

AAndrews said
Just guessing like everyone else here but l think I see a harmonic balancer bolt that's not tightened all the way in. Is it possible that this is a warranty block, just rebuilt and not reassembled completely with the proper harmonic balancer?
Also, never heard of industrial or marine applications for the 340. I've seen 318,383 and 440's on boats but never a 340.

Yes they did put 340s in boats. They had one that turned backward of the other one. Reverse rotation is the words I wanted to say.
If you think back on the earlier 318 and 277s some of them had just a pulley for a harmonic balancer.

If you don't want it send it to me I'll use it for something.