440 tunnel ram

E is cast crank, starting in '73 or '74, don't remember right off. The T designation began in 1976, (my guess is for Trenton) All big blocks B or RB from 76 on began with year followed by T. You can faintly make out 7 in front of 9 before the T. 43 degrees total advance seems a little high to me, even for a low compression open chamber engine with the piston way down in the hole. Your compression readings are within 10 percent of one another. Do you know the history of the engine and what it came out of?