Saenz vs Quaife
 

Does anyone use one of these transmissions how do you like it?
Would you change to something else?

Both are great boxes with the Saenz being a bit more stout. Both are older designs and still quite expensive. Keep in mind that these are both RACE boxes and will be loud and labor intensive in a street car. If it is a race car then rock on! Might want to check into Hollinger and Hewland boxes also. Seems that the TramsAm guys all moved to these a number of years ago for better manufacturing tollerances and sequential shifting.

From what others have told me, the Quaife will not be strong enough for your 20B.
Saenz makes severl models of transmissions - which one are you looking at?
I run a G-Force GF-5R box. It weighs more than the Saenz, but it is built to withstand over 500 ft-lbf torque. Cost with adapters will be about $6500.

I was looking at the saenz TT Series - Six Speed

Was going to go with the hewland but they are about double the price