Decode my 340, please?

Can someone please decode my 340. I am not keeping it, changed direction, but like to know what it is. Thanks.
Left front pad: HM340R 37000187
Right side pad: 2A119682
Casting: 2780930-340-8 I understand this one.
Stamping near mount boss: 6-17-71
Clock like stamp: points to 2