bubbatexas
New Member
On my '93 C3500 the valve cover decal says the engine code is RKJ and it states the est. horsepower as 200. Does anyone have any info on this engine, such as the differences between a "F" code engine and mine. It also seems to be a little louder than any other 6.5 I have ever heard, however it does have 360,000 miles on it. Thanks in advance for any info.