Variable hydraulic lifters for 440 engine

AJ/FormS said

@Bighead440
I understand that,and I like it, But what are your thoughts as to valve float and PV clearance, using that method?
How fast are those lifters at 6500 rpm, if the valves fly off the nose? or bounce off the seat?
Regular lifters have a plunger travel approaching .125.
So if the Rhoads are the same, then being off the bottom .035, allows .090 additional plunger travel. Does a guy have to re-engineer his PV clearance?
How about installing some height adjuster/ travel limiters, inside the lifter bodies

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Understand that these are V-Max and not regular Rhoads. You still have to set your VP clearance with a solid tappet or the V-Max with zero lash (bottomed). I have truly never seen the rpm limit of them, as I have only revved a 367" cast piston/stock rod J-headed 360 to 7000+rpm with a .508 Purple Plus camshaft and 273 rockers/pushrods. Ran 7.0/96mph in the 1/8mi in a way undergeared 2500lb Daytona RWD conversion. They work! I want to try them in a big-block soon, trying to figure the (over?)cam now, a '65 413 low mileage rering/bearing. Have some MaxWedge rockers or possibly Crane ductiles so I can split the ratios, if dictated by my cam choice.