Now we are getting why the factory did not use 4 inch strokes, longevity. Why even the 360 wasn't pushed as a performance motor, no forged crank was ever made by factory mopar for passenger cars or trucks. Shorter pistons rock more in their bores as they go up and down.
GM and Ford went with 3 inch strokes on the 283/289/302 motors and 3.25 on the 327's. True the 454 had a 4 inch stroke but it was a higher deck block with longer piston walls.
I got 600 miles on my 340 now and if gas was $1.50 it likely have well over a 1,000 miles now. I didn't go stroker cause partly the cost but am glad in a way now I went with a 3.31 stroke. Motor makes good power too, with a 10 inch converter and 3.91 gears torque seems great as well.
