I have help tune and owned a bunch of six pak motors with larger cams than that I'm a comp Cams dealer also, PM me if you want a good deal on a new cam and lifters I would use the XR292HR-10 in your car or a similar grind if you want a stock type hydraulic lifters and cam BTW, you will neeed adjustable rockers and the proper pushrods with the bigger cams like those My street Duster has a Comp Cams custom grind solid roller that is 260 degrees at .050 with .700 net lift, the motor is a pum gas 518 C.I. low deck stroker with a six pak, it has ran 10.43 ET at 128.+ MPH on pump gas with the air cleaner and mufflers on Mopar sixpaks rule, BB or SB