I know engineers don't always get it right... I was one for awhile. :icon_biggrin:
I actually thing the unsprung weight issue is pretty-much a wash if the disc conversion uses iron calipers. I did just such a conversion on a friend's 9" Ford using weld-on brackets and GM Metric calipers. It may have actually weighed more... but that was on a rock crawler, so braking effect may depend on only two of the wheels being on the ground. Fade certainly wasn't an issue with either setup.
I actually thing the unsprung weight issue is pretty-much a wash if the disc conversion uses iron calipers. I did just such a conversion on a friend's 9" Ford using weld-on brackets and GM Metric calipers. It may have actually weighed more... but that was on a rock crawler, so braking effect may depend on only two of the wheels being on the ground. Fade certainly wasn't an issue with either setup.