lol....sorry. I'll simplify. The outside diameter is first. the inner diameter is second.
Pressure when installed at 1.90: 148psi on the seat, 456psi at .650 lift
Max lift at 1.90 installed height is .745, and at that lift that will leave you .070 before coil bind.
You need to know what the installed height on your exact heads was, to find out exactly how much room you have left. If they are installed shorter, you have less lift before they go into coil bind. You have a ton of room either way IMO. does that help at all?