The TC sounds cheaper. Would that be the best thing to do after the Final Drive swap?

 

Looks I am close to doing one of these. Which one should I do first...the TC or Valve Boyd upgrade? The 3.5 swap may happen in the next few months as well.

 

From my perspective unless you are going to or have installed F/I........go for the valve body upgrade first.....crisper shifting.
However if you have or are thinking about F/I in the near future.....then do the TC first, and have your stall speed adjusted, to take advantage of the onset of boost(also better handle the increased torque)........this is my plan.