My roller on my old 542 was 274 and 282 and they were fairly even in clearance with the exhaust having more of coarse It is common now but the intake centerine procedure is the same. I degree intake and exhaust often. And we have had brain fart days where we started with the exhaust lifter and we scratching our heads?? then the oh S$$$ we're in the wrong lifter. If your using seat to seat lobe lift .033 is eqaul to .050 at the valve seat so I do
that and .100 before and after Max lift to be sure.
If your shooting for 106 ATDC intake the exhaust lobe max lift will be at 114 ABDC