quick question, any info would be appreciated!

long story short the 2.6 in my '89 Ram 50 4x4 has a bad cylinder head. spent most of the summer looking for a donor only to find a late 1980's dodge caravan a block from my house with a 2.6 liter engine. will the front wheel drive engine (or even just the cylinder head) work in my truck? are there any differences between the FWD and RWD engines?

thanks!
-Ryan