Piston - which one to buy

[jpjeep26uk]

Hi all, can anyone tell me the model/ make or type of Piston and rings I need for my 1988 2.5l please?
I don't know if it's the 103hp or 117hp 2.5l on mine?
It's going in to a guy after Christmas and I'm planning ahead in anticipation of a blown ring or knackered piston.
Is it a big job? Thanks again!

 

[Flyer58]

Check the Sealed Power website. Many engine rebuild shops use them.

Edit: Don't order anything until you see the size of the pistons already installed. There's always a chance something happened in the past and they may be oversize pistons in there.