340 cast crank vs 318 cast crank

[SuperStock]

Can anyone please confirm that 340 cast crank 72-73 has 1 inch holes drilled through the "connecting-rods journal" number #1 and #4 while the 318 cast crank 68-73 is solid, no holes drilled?

Thanks in advance.

 

[mikedevore]

I have a 340 cast crank home at my shop, I thought the 340's had a 5/8 hole drilled thru rod pin.