Casting Numbers on Engine

Here is your block: 4323330 as you described,but there is no number like that,but there is a 4323302 forth genaration block,86-90.
5M318= 1985 mound road plant,318
0314=10,000 day calender
1357=the 1357 motor built at that plant
The 13 stands for the 13th time that mold has been refitted
So double check your casting number and post back,mrmopartech