Got these links here at this site askin the same Q a while back and they were very helpful. If you go to the left and click the drop down under Main Menu and choose Search and Pacer you should find some discusions and more links here at CHR

http://www.chevytrucks.org/tech/ifs&rearend.htm

http://www.chevytrucks.org/tech/ifs.htm

http://www.chassisengineeringinc.com...1954chevpu.htm