Stainless Valves for 317's
 

I plan on purchasing 2.02"/1.60" stainless valves for my FI project on my 317 heads. That size so I dont have so change the valve seats.

Is there a brand you see as a better choice? Manley?
Would you use extreme duty exhaust valves or standard stainless?

Where would you buy them? Do they come with a 5 valve job?