bad valve and what else?

[lixar420]

I swapped a 4.0 from a 92 explorer into my 90 bronco 2.
when i started it for the first time it was extreemly hard to start and smoked ALOT of white. i decided to take the heads off and see whats going on, i found a burnt exhausr valve in one cylider and tan colored cylinder walls in another. Iwas told that the valve is caused by a fuel issue but what caused on cyl to be a tan color and the rest to be shiny?

 

[Brownie Mobile]

Sounds like water in your oil.

 

[rochhound]

had the same issue with my 4.0 installed in my 1988,befor you go any further i suggest
you have the heads maged for cracks and checked for warpage. these heads are notorious for cracking and warping when over heated.