(some stated above) torque converter, z06 cam, Electric fan, vette servos, headers, then bb tune should clean it up nicely
so i have been told (still working on mine)
Why is everyone so hung up on the vetter servo? If you want better money spent you better go with a shift kit as well and service the transmission with a new filter and fluid.
Also many dont mention this if you are planning a converter swap you need to upgrade the transmission cooler.
the ZO6 Cam is a waste of time.
Here is my list
Converter
Trans cooler
Superior shift kit
Vette Servo (Only if you are going to do the shift kit)
trans fluid
pan gasket
trans filter
Electric fans
Tune