Congrats! Yep, been there done that. I have the 8.1L Chevy in my sig that just couldn't pull the 355 or 365 on the interstates. So that is why I have the Ford diesel in my sig as well! Still love both HUGE trucks, but look tiny in front of teh camper!
2012 Sandpiper 365SAQ weighing @ 15k, Onan, 2nd air, slide toppers, TST
2013 F350 6.7L Lariat 4x4 CC DRW,Viair 1007, Ride-Rites, Edge CTS, B&W
2001 Chevy 3500CC DRW 4x4, 8.1L, 4.10 gears w/ Detroit TrueTrac
2001 Ford Excursion Limited 4x4 7.3L,V/B Spring Mod, ProComps, Hellwig Swaybar, & other 'Necessities'