Valves weight question Ti vs Stainless

I run mostly all titanium intakes in most everything I build now(which is only three engines, but spare heads too). The exhaust valves are SS, as exhaust lobes are generally more gentile, and SS is a better heat conductor than Ti.

You want weights? OK, 2.19 intakes at 4.950 OAL, (IE +050 BB dimensions) using a 7mm stem are 78gms. They use a 55 degree seat and are CrN coated. NASCAR stuff, it's all going to be 50 and 55 degree seats. You don't grind/reface them, the coating is essential. Using a solid flat tappet in a 457, I'm planning on endurance runs to 7k, with "beehive" springs and fairly tame pressures. 110 seat and 310 open. You must use a lash cap, and you want to use bronze guides, sized properly. I run .0015 intake and .0025 exhaust clearances(with SS). From what I hear/see, the intake clearance is on the loose side, you can go .001 or even .0008, I hear. I'm not that brave, TBH. Ti valves do not like flex, so you can't cheat on guide clearances or valve job concentricity.

I will do some 6mm stuff eventually, those weigh 65gm. I think it's kinda past the point of diminishing returns, as I'm still wet sump oiling(with a crank scraper) and even a 3.38 stroke engine isn't going to need that sort of rpm. S/F....Ken M