I posted earlier that i didnt have a 53 block, But mine doesnt appear to have anything stamped on it, just a blank spot. I know I'm looking in the right place...I think! Is this right? Thanks for the help.
Also where is the test port for the FP guauge?

 

oops, wrong forum . Sorry!

 

https://www.dieseltruckresource.com/...d.php?t=110028

Go to the second page, i have a pic up of where to look for the block number

 

Thats where I lookes but didnt see any numbers, is there supposed to be some numbers there (if not 53)?

 

i belive so.....54's and 55's i think