302 date code?
Well, I don't have a listing for a D20E under 302's, but that doesn't mean much because Ford cast a lot of blocks
D - decade - 1970
2 - year - 1972
0 - Fairlane/Torino car line
E - Engine series
6015 - base part number for engine block casting
AB - Engineering chance level or similar
3B8 - February 8, 1973
3 - 1973
B - February
8 - 8th day
Thats the way I read it, anyway.
1967 Falcon 4 door 351C - 70 Mustang 351C
Owner built, owner abused.