Hi, I'm new to the forum. My father is an engine rebuilder and is currently working on a 1.9L cylinder head. The customer has upgraded to .080 pistons and a better cam. My question is about the exhaust springs. The cam is .430 lift, and at that, the stock spring is .008" from coilbind with the rotator under it. The valve stems are set to spec also. The parts warehouse we used is in California, and they said the stock springs would work with the cam for street use, but as an experienced engine builder, my dad is skeptical. Can anyone tell me about this issue?