Can anyone help me with calculating DCR on an LT1? I don't know much, if any of the vital info. I have flow #s, but no cc's on my GTP LT4 heads. Don't know bore, stroke, head gasket thickness, cylinder head chamber volume, etc...I'm trying out ideas for a custom cam. Car is actually an LT1, but with mods is more like an LT4 "clone" No undercut crankshaft, etc..I checked out the DCR calculator from Kelley, but can't download it. Thanks for any help.