Editing Chevy engine id

Hi, 

I have a 350  BUT I don't  KNOW WHAT YEAR IT IS HARD TIME GETTING PARTS.   Can any ONE HELP? 

Numbers on the  BLOCK ARE M08099VPON RT FRONT PAD, 10066036 ON BACK ON BELL HOUSING

A 350 Chevy engine and you have trouble getting parts?  Find a new suppler of parts.

Also , look at Mortec.com for information on the numbers