head rebuild ? re sodium ex valve
 

sent my heads out for a rebuild, all my valves are toast!
is it worth the extra $ for sodium exhaust valves?
engine is a stock 72 E with no plans for racing
did a search seems pretty evenly split.
anyone here have an opinion?

I used stainless steel because NOS were prohibitively expensive. The sodium ones are better, however I found that I could buy a lot of gasket kits for subsequent teardowns for the delta in price.

That said, the later valves are a LOT cheaper than 35mm nailheads.

thanks john