What size bolts connect the 727 transmission to the mopar 440 big block?

whats size socket will i need to remove it?|||9/16. and you'll need a 9/16 for the cross member and drive shaft if you have not disconnected those yet. good luck. and use liquid wrench or wd40 to make it easier.|||The 4 upper ones are 3/8" bolts with 9/16" heads, and the two lower ones facing other way are 7/16" threads with 5/8" heads. All are coarse thread.|||9/16 on both