So if I understand correctly you only have 2000 miles on these Lunati springs, which have 140 lbs seat, 360+ spring rate, 1.1 coil bind. If it was able to control the valves with the smaller 423, the new cam is a variation of a 433. Which is only one step bigger from the same cam family for shelf grinds. My opinion is you really shouldn’t need to do anything but switch cams. Switching springs at 2000 miles seem recreational to me. Should go 20K before loosing any spring pressure on that mild spring. Be nice to know the actual pressures for the springs, what Steve C said.and fwiw…looking at the Lunati spring specs, I would have put a .030” shim under the springs with either cam.
That new cam your looking at is a much better choice. Get it done.
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