On the link shawnlee gave, use just the 0.050" figure. Do not add anything to it. On the KB calculator that I have been using, add 15 to the 0.050" figure.

On that other cam that you say has a closing point at 86 degrees ABDC, that would be one hellacious camshaft, somewhere on the order of 290 degrees duration @0.050" tappet lift (about 330 degrees advertised). A cam like that would only be used in a 12.5 to 14.0 static compression ratio motor and would make power from about 5,500 to 9,000 rpm's.