Is it physically impossible to turn a 4 speed 4.3 into a 5 speed (manual)? But, I guess nothing is impossible if you are willing to spend the extra cash. I was just wondering how hard it would be and the labor cost of something like this.
Physically impossible? No.
Start with the obvious stuff, tranny clutch, pedal assembly, flywheel.
See if you can get that first, Ive been looking for an NV3500 (the stock 4.3 5 speed) for a long time.
There are 4.3 4wd 5 speeds but I have never seen one with pushbutton 4wd, Ive only seen them with the shifter on the floor. Dont know which one you have already but hopefully someone else can verify that for you.