Lunati 60403 with Hughes 1110 spring???

Lunati is giving you the spring rate not the installed pressure and pressure at max lift. So if you set the Lunati spring at 120 pounds on the seat and you want the pressure at
.550 lift, multiply .550 times 363 gives you 199.65 plus seat pressure is 319.65 pounds at .550 lift. Its just math not rocket science.