Looking at installing a roller cam in my 427 in pursuit of more low-end torque. Running a 270/280 duration (218/228 @ .050 lift) .500 lift GM Marine cam advanced 4* at present but think a roller might do a better job for me. Been looking at the Comp Cam Xtreme Energy XR258HR cam with 258/264 duration (206/212 @ .050 lift) .510 lift for better torque down low (2400) Like to see peak torque around 3000-3200. Anyone ever run a roller in a BBC. How much work to convert older model BBC’s to roller cam? Better cams out there? Worth it?