Stock to stock or modified similarly a 318 will NEVER touch a 340..remember 340's were only placed in performance applications..318,s were put in everything from trucks to taxi cabs hense the term "boat anchors"...
A term only used by you here and one I never hear anywhere in the real world. Words you use so much, you must say them in your sleep. Words that don't help the OE poster and his question in most threads you post in.
Do you think you could actually help for a change?