2010 Peterbilt 387 HELP

[Sedrick]

Good evening group and thankyou Rawze for allowing me to join. I would like to get every ones thoughts and advice on a truck I just purchased.
I just purchased a 2010 Peterbilt 387 with a 15L ISX.
I plan to restore/customize this rig and then work it part time hauling cars. I currently work as The Terminal Manager for a Trucking company. I give you some back ground on the truck that I have found out.
The Truck has been sitting for over a year
The truck has 1.4 million miles on it
I have no maintenance records but I was able to track down the previous owner to get a little information. The previous owner had the truck for 2 years with no major repairs needed. He said that he hated to see the truck go.
My questions to the group are...…
1. What should I be looking to replace first ?
2. What should I expect to go bad first ?
3. What PM items should be taken car of first besides replacing ALL fluids ?
4. How do I get maintenance records from Peterbilt or Cummins ?
MY plans with this truck....
1. New paint and minor bodywork
2. Have all wheels and tanks polished
3. All new tires
4. New brake shoes, drums, wheel seals, S-cam bushings, maybe new slack adjusters
5. New interior with custom cabinets and laminate floors
I would love any advice and tips that you guys can give me.