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

Hmm here we go again lol

What silicon content forged pistons are you running? What are the clearance number's from pistons to cylinder? What cranking compression? Personally I have never seen a forged piston motor last to 100,000 miles no matter what. Some hyper's yeah and cast yeah but not forged. All of the forged pistons I have ever seen run loose clearances to allow for the expanding and then they beat on the cylinder walls and wear out faster

Most forged pistons for street/strip stuff go in at .004 and that’s not much. Stroke and rod length have much more affect on longevity than a forged piston does. The factory used cast pistons because they are cheap. Not better.