Edelbrock heads question

https://www.summitracing.com/parts/edl-5845/applications

Installed Height (in):1.800 in.

Seat Pressure at Installed Height (lbs):150 lbs.

Open Height (in):1.750 in.

Open Pressure (lbs):420 lbs.


guess no one knows how to use google to look stuff up...l;ol

probably hydraulic roller..,,coil bind at 1.200,,,,