I would keep everything you have and buy some good shocks. My red car was night/day with good shocks. The old shocks sucked so much it bent the rear leaf spring segments and killed the u-joints over time.
Viking Shocks
Drag radials
HD u-joints
Check the u-joints often!
Sounds like a plan, I'll have to check out Viking's website.
As far as the spool, it's $100, any posi unit I would trust in a high10/low 11 second car would be expen$ive. I don't love a spool on the street but I ran them for a couple decades with no problems.
