A question about intakes

So update. Just picked up the engine. Intake does not have ld4b on either end, just d4b and the Chrysler number. Took one bolt out but haven't checked size yet, but holes have not been modified at all. Intake is in nice shape, just have to drill out one broken stud and Chase the threads on the others to clean them up but overall good. Motor is stuck but I have put PB blaster in to let it soak for a few days.

Where are the engine numbers located so I can determine year? The head numbers are 2658920-2 which according to my research is 66-67 273 so now I'm really confused. The bolt holes on the intake don't look drilled out and the bolts sit flush but the numbers on the intake say it should be for earlier heads.

Heads look like a good set by the numbers, shows from a 4bbl, so I'm hoping for high rise Pistons too which will make a good engine to build.

20191006_140849.jpg

20191006_143513.jpg

20191006_143518.jpg

20191006_144921.jpg