i need valve spring help,please

Well there may not be much diff between the Comp springs and the Lunati springs. I see the comp springs are rated at 353 lbs./in and the Lunati's at 363 lbs./in. Although the Lunati are double springs where as the comps are singles. Not sure how that would affect things. If their starting pressure is the same then their ending pressure would be close since they are close to the same rate. Problem is it don't tell the pressure at installed height. If it did that I could say positively if they would interchange or not. Maybe go onto Lunati's website (part of Holley div.) and see if it tells the spring pressure required. Also again another consideration is whether or not your heads have been cut for dual springs like I said earlier. If they haven't you would be better going with the single spring unless you want to remove the heads and have them done.

Sometimes you just have to match up springs by the pressure required by the cam mfg. and what your putting them on. You also have to match the retainers to the springs so they fit tight and can't walk at that point and you should run spring locators to keep them from walking around on the head. That is detrimental to springs and head surfaces. And lastly set the spring heights to specs.