Originally Posted by M.Rydell
Heads can handle up to .550 lift. Forgot to write that
Then you need to step up to a roller cam if you want that much lift. You only need about 225/230 duration (on a hydraulic cam), and maybe 5 degrees or so less.
If you can't afford a roller cam you can run an aggressive solid flat tappet cam with higher ratio rockers, good springs, and grooved lifter bores and face oiling lifters and it MAY last.
For something like that try the Lunati 60140 and only run 1.6 rockers on the intake.
Running a roller cam will get you better performance and durability, but the costs are higher as I'm sure you know.