I'm using the same tq wrench and haven't had issues, though I do not know how accurate it is.
For a floor jack I'm using this unit
3000 Lb. Capacity Aluminum Racing Jack
This jack has been great for me so far. I've used it for about 2-3 yrs. I use it along with a sliced hockey puck to jack up on the pinch welds.
Nice car, hope to join you with the FI 18" soon