I agree with GMONIZ,It all depends on what you want to do with your truck. As a 3600 owner myself, I initially thought of shortening it but I'm glad I didn't. I haven't had any issues with parts, much of which is interchangeable with the 3100.
Robert C.
If it's true what they say, "You learn from your mistakes,"
I'm a Genius in the making.
1950 3600 
