318 horsepower

If everybody stops for a second and thinks, even though the 340 has a heavier slug, the stroke is what will get this engine spinning higher and quicker since the distance is shorter.

Add light weight pistons to it or ethier engine and the 340 is still going to spin up quicker and higher.

A longer stroke engine has to move the piston a greater distance and has an issue with piston speed witch has a speed ceiling limiting it to *** RPM's.

The next item in high RPM's is valve control which is the springs job.