I have a 91 4.9L straight six and am replacing the fuel injectors, but the replacements I bought from NAPA are diufferent from the stock though they will still fit and seal as the originals. The replacements for the 92s look like my originals but cost $20.00ea more.

I had already bought the ones listed for 91 and noticed the difference while swaping them out. I have not put fuel rail back on truck yet. Does any one if they are interchangeable.

 

Different in what way?

Taller?
Different electrical connector?
Fuel rail connection to electrical connector orientaion?