Where is the VIN stamped on a '70 340 block?

I was looking under the engine while the Duster was up on the lift, for the VIN stamping. I had a crappy light but could see a 340 stamped on the left side above the starter, and a date 1-10-1970 on the right side ..

Where's the serial #? I've got the tranny#, door plate and dash plate, so far all matching, and I think there is one on the radiator support? I'm not going to pull the radiator if that's the only way to find it, but really would like to ID the block.

Thanks folks,

Kenny