I bought a 1950 chevy axle from a guy how said it had holes in it for a rack and pinion. He said that it worked great but i never tried it out because my truck seemed to drive as good as it should already with a stock box.
I put disk brakes on my chevy using mustang two rotors and pistones. they had a chevy lug pattern on them so i could use chevy wheels. I bought a braket to bolt this on to the axle. I got the stuff from so-cal speed shop it all cost me less than $400