Does anyone have any experience using Rhodes lifters? I am biulding a 496 for my mud bog truck and must pull 16'' vac at 1000. They claim an increase of 2-6 in.I am going with a Howards solid roller 4/7 swap with 260/270@50 680/680 with114 lsa.Their tech suggested this grind and said it would pull but no guarantees. Any thoughts or suggestions would be appreciated. Thanks