Yep, got them last night. Took a good look at them - but couldn't tell where the casting # is on the intake manifold. I saw the casting and date codes for the heads, have an idea where the casting # is for the block (the code I found on the block I believe is the date code as it's stamped or punched into a machined flat surface just above the oil filter), but couldn't pinpoint a location for the intake.

Thanks for sending those pics btw, it's helping!
Chris