Lemme try and pick these as i know them...
Of course the block casting date is 6 11 69
Stamping on the block: E (1969) 383 (383) 6 (month = June) 30 (day = 30) 2 (number engine built that day)
HP (High Performance)
According to the pad on top of the block, it's the second engine built on June 30, 1969 and is a High Performance 383
"How to Rebuild Big Block Mopar Engines" by Don Taylor lists the casting number for '59-'71 383s as 2568130 so 2468130 is close enough for me. The 11 after it i would guess indicates the 11th block cast. I believe that on what day it was cast is contained in the 9G or 9C304743.
Hope this helps a bit :thumbs: