Panama...the south american country...???
Anyways...what is your budget?
I would buy gauges, EGT, boost, tranny temp, engine oil temp, water temp, oil pressure. Buy good quality gauges, autometer, ISSPRO, ect.
After that, open up the exhaust. You dont need any muffler or anything, as the turbo is a good enough muffler. 4" is a good size to go with, lets it breathe good.
The stock intake is fine, thats what I'm running. Make sure you have a new filter in it.
Give it filter changes, fuel filter, oil filter, air filter (previsouly mentioned). Might as well send an oil sample in to blackstone (or another company that does oil tests) and see what they say. Might want to look into a bypass oil filter kit (you have your main oil filter, then another filter mounted somewhere, extends oil life).
Tranny. The C6 is stout, but it doesnt lock the converter, and it has no overdrive. At the very least get yourself the biggest GVW rated tranny oil cooler you can find, and plumb it in. You want to keep your tranny temps down. You can also get a lower stall torque converter, and shift kit, which will both help.
Change diff fluids, tranny fluid, and transfer case fluid. Make sure you have spare U-joints on hand. New belts are a good idea.
Do a coolant flush, and add coolant with the proper SCA additive in it. Use distilled water (its like a dollar a gallon, not that bad).
For my Oregon to Texas drive I had the following: All my old belts, just in case. Oil filter, fuel filter. Three gallons oil, two gallons coolant. Two gallons distilled water. Fuel additive. A large craftsman tool set.
There you go.