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

Now hold on now. You're makin up rules as you go along. Who says we each didn't already have the engines layin around already? In that instance, dollar for dollar. The bigger motor will win.
1st post... I even gave an example of a 340 for sale and have said, if you have to get a motor, is the 318 the better choice on a low budget to go fast