Today, dollar for dollar, is the 318 faster than the 340 ???

Dartswinger70 said
I just watched that Nicks dyno run of a 340, he hit 340 Crank horsepower at 5900 rpm...
Not bad, they said the heads had "mild porting".

Nat said
was that a stock rebuild ? waiting for the next 340 he builds and tests 340 sounds low for a good 340

That's about right, it takes a little more than most think to get 400 HP out of a 340.
The 340 was pretty much optimized from the factory.