Ok so go all out if you want to. Some people get 550-450's and keep them at max GVW and beyond. These engines wont last long, if they're cranked up and loaded all the time. I'm not a 6.0 hater, its just a fact. Doesnt sound like you'll be loaded up, so you should be fine.
I see you have new heads, but did you get studs too? Get custom tunes for the CTS from Bill, and have the FICM programed with the A40. You can change the max power you want from it with the CTS and the custom tunes, but you'll always a minimum of 40 over stock with the FICM program. Unless you buy the FICM programmer, then you can change that when ever you want aswell.
jeremy
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19 F-350 6.7 Auto
16 F-350 6.7 Auto
05 Excursion 6.0, Auto, PHP Atlas 40 FICM, ARP Studs VXBC6(truck PCM)
00 F-350 7.3, 12 Speed, PHP Gryphon, PHP hydra, DAC3
95 F-Superduty 7.3 DI, Auto, Mechanics Truck
94 F-Superduty 7.3 DI, 5 speed, Flatbed
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