That's a good size.
Here's how to install:
1) Take apart grill
2) Disconnect the top tranny cooler line coming into the radiator just below the radiator cap
3) Slide that flare nut down the line a ways as you won't be using it now
4) Install the supplied fitting into the opening that now exists in your radiator
5) Mount the tranny cooler (preferrably with brackets, but you can use the plastic ties supplied in the kit)
6) Take rubber hose, attach to the disconnected tranny fluid line with a hose clamp, then route through radiator support, cut to proper length, and attach to one of the outlets on the tranny cooler with a hose clamp
7) Take other section of hose, attach to the fitting in the upper hole of the radiator with hose clamp, route through to cooler, attach to other outlet on tranny cooler with hose clamp
8) Dump about 1/4 quart of ATF down filler tube, start truck, check for leaks, check fluid level, check for leaks again, shut off truck
9) Check hose clamp tightness again before assembling grill (The rubber of the hose should be squashed enough so that it's bulging through the holes in the hose clamp just enough to be flush with the hose clamp surface)
10) Assemble grill, drive truck, and listen to your tranny saying, "thank you"
Hope that helped. /forums/images/graemlins/thumb.gif
On a side note, out of my curiosity, does anyone know what kind of PSI is running through those cooler lines? Thanks.