I have a 1985 Ford f700 4x4 that has the rockwell axles under it. They have the air-over-hydraulic brakes on them. I also have a 1995 ford f800 that has air brakes on it with a rockwell rearend. My question is: Is it possible to switch the 4x4 rearend/frontend from the 85 to the 95 and keep...