CNC high flow heads question

[Slick4.6]

quick question for you guys. I ended up getting a pair of the frpp cnc high flow heads for a killer deal. The ones with the bigger valves and so on. My question is what kind of valve springs did they put in these? Just wondering what my max lift will be so I can get custom cams accordingly. Thanks.

 

[drive_55_not]

IIRC Livernois manufactured those heads for FRPP .. I belive they also used Manley NexTek valve springs that were good for .580 lift.

Realistically there's zero reason to go over .550 lift on a cam with these 3v modular heads ..