Holset turbo kit?
HA! I wish.
My turbo came from a craigs list add, the exhaust piping came from the stainless steel pile at the scrap yard. The only kit I bought was a so called 3'' "universal fit" aluminum pipe and intercooler kit, which I had to cut, weld and buy additional pieces for.
I specifically searched out a 6.5L #506 block because it had piston oil squirters.
Its a turbo short block with non turbo heads and injection parts.
For a time there was a dealer option to have the dealership install a factory approved banks turbo kit on new non-turbo 6.2L trucks, doing so didn't involve taking apart the long block, it also didn't void the warranty.
Banks used fuelling and a big non waste gated turbo to limit boost to about 8psi.
A larger oil cooler?
Done:
Question: Turbo charging a turbocharger - Page 20 - Diesel Place : Chevrolet and GMC Diesel Truck Forums
Along with a transmission cooler that is nothing less than extreme over kill.
I should add that the factory approved aftermarket turbo kit didn't include any additional engine oil or transmission cooling.
As far as "hauling their solitary butt down the highway!"
Stripped and bare my suburban weighs in at about 5800lb.
Minimum tool load with spare tire kicks the weight up to about 6200.
Add my empty trailer, +300lb.
I know this from going over the scales at the scrap yard in those various configurations.
Any highway trip I go on will have the minimum tool load at the very least, if there is no requirement for a trailer or minimum tool load then I take the car.
Edit: since this post I have:
-Dumped 200lb of scrap off at the scrap yard
-Bought 1200lb of steel from the scrap yard (900lb one trip, 300lb the next )
-Hauled 2 trailer loads of fire wood
-Bought a bunch of 12 foot length 2x10s and deck planks.
-Moved (some one else)
All while equipped with the "minimum tool load".