I did the .096 "firm" size holes on my 80e , was way to much for the street , chirped second every time it shifted , but Greg you may like it that hard .
I shot penned the holes back to the "average" hole size (.076) , and if I want more kick I do it through the tune .
But the Instruction say if you are using a "off-road use and with small diameter high stall converter make holes .120" .
And you about right 4 hours in truck application .