Cam ramp design

[Tony Z]

I honestly think an FK87 would make your engine live slightly longer, but I am guessing here, I have never tried anything like a W140 w 1.25s

You would prob surprise yourself, get a set of Titanium retainers and the new aluminum pushrods and you should be able to run stock duals.
Once again, I am guessing here, but I honestly think that if your cam and rocker combo can do what it is, I think that switching to a 1.4 ratio setup will not require changing your springs - depending on the final lift you achieve.