Interchangeable cylinder heads

[coulrophobian]

I have an '89 Ranger with a stock 2.9L V6 and recently cracked a head. My first question would be are the heads interchangeable, in other words, can the head that was on the passenger side be bolted back onto the block on the driver side? I was told that the only thing that I have to look for when finding a new head was the casting number which match (86TM). Is this REALLY the only thing I have to watch out for?

 

[Psychopete]

Yes, they are interchangeable from left to right.

Pete