360 Performance

I have 360 J Heads where I want but in stainless steel Valves with the Lunati Voodoo Cam 268° /276° .
How are the Valve specs from the Stock 2.02 and 1.60 Valves ?
Must be all Parts stainless steel or could I take also some Stock Parts ?
Which Valve Springs did I need for this cam ?

Thx alot for help and Information