What type of 440 is this? (Pictures)

Here's are articles on 440 heads. The 902s are discussed towards the end of the first article. The second is a forum where a guy has written in to see how to get power out of the 902s.

http://www.moparmusclemagazine.com/techarticles/5115_cylinder_heads/


http://forums.moparmusclemagazine.c...-please-to-get-decend-power-out-of-73-440-wi/

http://www.moparts.org/Tech/Archive/bb/62.html