I have a nonroller 308 block that was bored with .040 pistons, stock rods, and it had a billet steel flywheel. I took the billet flywheel off it and put it on my engine and my engine has a slight vibration when it revs down in neutral (right around 1,600-1,800rpms) (I just put the motor together so i couldnt tell if its from this or not) Is it possible since it is a nonroller block and has had some things done to it that it might be a 28oz. motor instead of a 50.oz? Is there a way i could look at the dampener from the nonroller motor to tell if it would be a 280z. or a 50oz.
