Engine year?

[yellowbelly]

Hello everyone. Does anyone know or where I can go to find out what year my engine is? The numbers on the block are F57E-6015DF
I am rebuilding a 2.3 pulled out of a 96 ranger. The gasket set was going great until I finished lapping the valves. When I went to install the valve stem seals, the valve stem seals in the kit are too big. All of the stores have to order them and I dont want to order them just to find out that they are the same ones that I have. Can any one help?

 

[scotts90ranger]

the block is a '95 casting so it is probably a '96

order them for something newer like a '97, sometime in there they made the valve stems smaller

 

[Mac]

There should also be a casting number on the head along with a four digit date code, someone might have already replaced the head.
Dave