[Yukon Jack]

I put a 3/4 ton front axle from a 78 in my 70 K5 and the biggest area of change had to do with the brake lines for the new disk brake equipped axle. I put in the 78's power master cylinder at the same time in place of my manual booster. I ended up making new hard brake lines so I wouldn't have adapter fittings at the rubber hose connection and at the proportioning valve. Was easy to make new lines and that was about the only thing I had to do to get the front axle swapped.