Valve Springs

Their spring 1129 is actually PAC 1903 valve spring...I use them on my solid lifter cams with an installed height of 1.80. With an LA head you would be looking for something with an installed height around 1.68.....

Those Pac spring would be way too stiff for an hydraulic cam.....

Hughes 1110 has an installed height of 1.66,.....

I have the same old hydraulic cam in my 73 Duster with eddy heads and eddy stock valve springs with a seat pressure of 120 lbs...