What if you have both (318/340) "sitting around" collecting dust and insect nests....the cost is the same across both, gasket set, timing set, cam, oil pump, rings, blah blah blah machine work...etc. then which, all things considered one would you build? (yes there are folks who have multiple engines siting around in their garage).
that's not the question as of course with both sat there we'd all use the 340. the question was if you had to buy and build for £*** which one would make more power? why do so many miss that point? :BangHead: