I'm building a Ls solid roller motor with PI/Mast heads. When I measered the spring install height it was 1.905 and I need to be at least 1.990 with my cam. I found a set of Crower titanium retainers part number 86067D-16 that would bring up the installed height were it needs to be. Has anyone used this retainer and spring combo? Would the Crower retainers work with the PAC 1225 springs?