That's a casting code. D2 = 1972. The rest I cannot desipher without my book. The actual assembly date will be stamped on the block end face directly behind the timing cover/ water pump plate.
How to rebuild Ford V8's by Tom Monroe is a good book that expalins how to read casting dates etc as well as full rebuild info.
If it's in good nick then the block along with the CC 4v heads is a very good base to start a high performance motor
Understeer is hitting the wall with the front of your car, oversteer is hitting the wall with the rear.