Stomper, Are you asking, Can you undo the 4x4 front axle assy. roll it over to the C30 frame. Unbolt the 2wd crossmember,ect. & slide the 4x4 axle under it? If so, It appears Yes. I have not done this, however years ago I planned to do it. I checked the frame measurement specs on both frames. The rails (in their basic form,shape & height from a datum line) are the same, however the holes to do the mounting are not there. The steering box,shocks mounts,brake hoses,cab mounts appeared to be the same. My memory says that there is an (oval?) hole in the same place on each of the rails, you may be able to use for measuring to line everything up. You will need to transfer the rad. support/4x4 spring mounts, transmission crossmember,motor mounts,ect. In the rear, the easy way out would be a lift block or else you would need to change the spring hangers. That's the basics, as I said I did not do this, so I can't say "I know it works & it's a piece of cake" but all things I checked, told me it was doable. Now worth it? That may be a different story. Good Luck, Lorne