Need some help locating number

[travelinman31]

I've searched the site and internet to no avail. Im trying to determine which block/block heater I have. I've been on, under, above the engine and i cant find the numbers I'm looking for. I've found a number on the intake, and their is an 85 stamped below valve cover. I have read that I'm looking for a number with U D and other numbers, but for the life of me I cant find it.

 

[Hydro-idi]

The engine serial number, if facing the front of the engine, will be directly below the right side of the injection pump. Wipe off the grime and see what she says.

 

[travelinman31]

Silly question but does the AC bracket sit over it. Or is it visible with AC in place?

 

[Hydro-idi]

It is visible with the a/c in place

 

[icanfixall]

Thats the correct location. Its really close to the rtv line so be prepared to cut some of it off to read all of it. Its the drivers side flat area just to the right of the injection pupm gear cover. It will be covered in dirt and grime.