You could have the cam adjusted. It should not cost much to adjust. I had Comp adjust my XE285HL down to a 108. My converter is a 3500 & the automatic 904 is now a manual shifting trans. The lower (numerical) number adds torque. If you had issues with a cam on a 108, with an automatic trans, I’m not sure what the possible problem would be. I can say the rough idle is a real PIA with a manual trans.