Another option . . . Use a hydraulic roller with the new (to me at least) Rhoads roller lifters. Rhodes has made lifters for years that improve idle vacuum and reduce idle duration. Now they are making them with rollers for big and small block Chevies. You'll get a ticking sound, like solids (some say this sound is too loud) the adjustment advantages of a hydraulic, the wear advantages of a roller. And you can use a little more duration, because it'll only come into play at higher RPM (like, above 3500 or so).
Food for thought???
If I was building my 383 over again, I'd get a stronger cam and try these lifters. Bu tfor me it's too late until the next time around.