Looking at doin some work on the 8.1 in my Hd. thinkin a bout Compcams 46-422-9. (xr270HR). how will this be with the stock converter? I'm looking into havin some port work done to the heads also. I'm not 100% sure on the direction I wanna go with the truck. I know I can't quite swing the Raylar stuff. I don't drive the truck everyday and rarely tow with it. I also plan on doin the basic header/intake/ECM mods obviously. haven't found Much info.thanks