I'm going to try and knock it down in weight a bit first though. Looks like an A-Body spindle is about 8.2# and an F-Body spindle is 3# lighter so sure enough I have over doubled the weight. At the same time, the Challenger spindle I had to take measurements off had to have been 25-30# and I found threads where the Camaro spindle was discussed at it was at least that heavy. So while mine would be heavier than stock, it's not anywhere close to some of the late model stuff.
