OK, thanks for the info !
I've never really had any problems with C-lip axles, so it's probably not worth the $$ to switch to bolt-in. I figure anybody who knows what they are, would want max $$ for one.
A complete 9" Ford to fit, is around $2k. So, if you had to add a new posi, gears, set-up, and a brake job, to an 8.5, after purchase, the 9" would probably be a better value. Hey, just thinkin out loud.
http://www.quickperformance.com/9-Fo...7_p_20387.html