New to V8's. 340 or 383?

I cant resist I have read people go on about the 360 being superior to the 340 how can a truck motor be a better design than a factory high Performance mill sure put some 340 parts on it or after market and it better well so what thats apples to oranges fact 340 never went in a pickup or van and was developed like the 426 four one thing only be the best at kicking *** Chrysler could lay down>. 360 race block??what ever