Inframe

[Ricky]

So I have an appointment for the first of February to take the ol girl to Mr Haggi for an inframe. She's got 1124xxx and counting, had rods and mains done once, so it's due. Runs really good with very little oil used between changes, is leaking some around the compressor. I do a lot of work on the truck myself but I'm just not up to inframing. But I know I want it done right so there was no question about it going to GA. Plus I'm really looking forward to meeting Mr Haggi and Rawze.
So I also want to replace the cams and injectors because of the miles. But I was wondering with changing cams and injectors can it be built to different specifications. I'm by no means wanting to jack up the HP and torque. But can you build a better mouse trap for say.
I have a 2008 Prostar with 871, SN79275004, with a Ultrashift and if I remember correctly 3:55s. I pull a flatbed and I'm heavy a lot but also dead head a lot. I don't run the truck hard and keep my RPMs up and boost down. I also never let it get hot. I'm always manually turning the fan on around 195. It’s just a habit and I feel it's helped it last so long. When ever I stop and the truck is idling I turn the fan on and leave it run.
Also leaning toward changing the oil cooler also, thoughts on that??? This truck is a keeper for me so I want to do it right. But if I can make it better then I'm open to changes.