I have a 78 K5 Full time 4X4 I believe thats a 203TF case?? 350 4 barel quadrajet RV cam Th350 203TF case I believe D44 Front Corp 10 bolt rear 342 gears ( I know this is a problem) 4" lift and 35 mud terrains All I use this for is mud, and my deer lease and occasionaly drive to work. This isnt a daily driver the Motor and trans were rebuilt seperately about 15K miles ago. I've always been into sports cars this is my first 4X4. Everytime I talk to a hard core 4X4 shop they keep telling me I need to swap out for 1 ton axles, 5:13 gears and a conversion kit for the 203. This truck was never 4X4'ed before I bought it and I am the 3rd owner. The owner before me had it for 2 years and never drove it. If I swap put the gears this thing should be fine ini the mud and light road duty right? All knowledge is appreciated..