I have a set of world industries heads that I bought for my 87 ranger with a 2.9l. I got rid of the engine but kept the heads.

My cousin has a 2000 explorer with the 4.0l ohv engine and we just got done pulling the tranny and noticed coolant from the driver head manifold. Thinking cracked head.

My question is will my heads work on his engine.

 

You are not the first to ask:

Short version, no.

https://www.ford-trucks.com/forums/5...terchange.html

Ran out of time searching, do a google, pretty sure every hit will tell you no.