I have a mint condition (bought new)1994 Chevy short wheel base 2WD, 5 speed manuel transmission. I also have a 1989 short wheel base 4WD - same transmission. The 4WD front and rear axles are in great shape as well as transmission and transfer case. Is it possible to make a 4WD out of my 94 with the 89 parts? Is that a difficult job or just plain work?