will 85 parts fit into my 84 if its the same engine

 

84 and 85 used a differnt motor, some parts are not interchangeable.

The 85 had a shorter block so your pistons, rods, crank, timing cover, and head will be different

 

so i would need 84 parts then if i want to get it all right

 

Well some stuff is interchangeable. What are you looking to replace?

 

well im looking for new parts cause all i can afford right now is an rebuild kit instead or a whole new engine

 

ok.. well it just depends on what parts your replacing. some are interchangeable some are not

 

i was thinking pistons basicly a rebuild kit everything

 

well, you cant really just throw any piston in there it's an extremely precision fit. Why do you think you need a rebuild? Because the pistons and cylinders are worn, throwing another potentially worn pison in an already worn cylinder wont help anything
To answer your question you will need 84 or earlier pistons.

If your going to do all of that you really should just do it right the first time. You wont be happy having to do it again because you went the cheap route.

 

true well when i took it apart everything looked good im just worried that something might break soon cause i got over 287,000 miles but im not sure if its the original engine or not

 

Did you do a compression test before you took it apart? If she's still holding 150psi then you probably can put it off for a while.

In my case, I could only hold 50psi after 6 cranks. Terrible.... I'll have to have my block bored and honed which will require .20 to .30 over pistons/rings to be installed. I have a shop that'll do all of that and dip it for about 200 bucks - to give you an idea of price. Then new pistons/rings, rebuild kit, new valves, new timing equipment w/ metal guides and a bit more - probably lookin at a grand or so all said and done. At least I'll have a brand spankin new engine that should last me a very long time.

 

I havent done a compression test on it yet guess i should do that first