I looked thru the original thread that I found on this conversion, and found one member that mentioned that he was having camber/caster issues, but no follow up.
http://www.67-72chevytrucks.com/vboa...ad.php?t=35042
I did physically measure a '69 C20 LCA and a '80 C20 LCA, and even though I could not get a precise measurement, I did not see that there was any difference in the measurement from the center of the shaft to the center of the balljoint. As far as I know the UCA's are the same from '73-'72, but I suppose that would be the next part to look into.