[Fot] GT6 GEARBOX AND DIFFERENTIAL

[igofaster at charter.net]

Greetings FoT ! 
Just finished the CVAR race last weekend. It will be the last weekend with my lovely T50 5 speed gearbox.... ugh....   used a smaller tire and was getting my revs quicker and actually needed the 5 speed on the straightaway.
Anyways... I've purchased the Triumph 4 speed gearbox from Quantum Mechanics. My questions are, should I continue running the overdrive differential, I believe it's a 3.73 ratio in the GT6, or go back to the stock ratio of 3.27? My friend Bob Kramer suggests I build the car to run its peak at TWS which does have a long straightaway. The other courses we run with CVAR do not have as long a straight.
I'm also wondering about the Quaff  (sp)  for the differential... seems they're in the $1200 range. Is it worth the dough or should I keep the current 3.73 gearbox or have a 3.27 welded locked?
Appreciate the group!
Bobby Whitehead  #54CVAR GT6+ EP Group2