Auto to Standard Transmission

I'm in the process of changing a 1.6 automatic into a 5-speed 4 x 4. However, I'm having a rough time finding a flywheel that will match up with my 1.6 engine. Is the back of the crankshaft for a 5-speed a different size than the crank for an auto? Most salvage people say these items should match up, yet they won't. HELP!

call the local chevy dealer and find out if the part numbers are the same for the cranks

I used to work at a engine shop and hear are your differences the 4 wd and 2 wd are different and the auto to manual are too and just to let you know they are 15 different blockd and cranks and flywheels sorry to bear bad news but that is the problem when chevolet throws something like a tracker together as cheap as possible