vivivivivibration

OK j.d. we have given that whole crankshaft situation a pretty good rundown. If it is the wrong flywheel I believe it would be shaking a lot worse than what your are talking about. To get a nice smooth running car everything has to be dialed in and working together.

I like your new pistons and cylinders, looks like you are doing a nice job.

A nice running engine depends on everything being all dialed and working properly. Like some of the other guys on here have been saying, start with a compression test, that is the foundation of a good running engine. 8 spark plugs out, throttle slightly open so it gets air, coil wire disconnected. Giver her a test, let us know the numbers you came up with for each cylinder. It should be at least 125 psi on a fresh build, depending on the heads you have and the compression ratio. You may have a little lower compression in the one hole where you were cleaning up the rust in the bore. Stock cast iron heads or aluminum aftermarkets. Hydraulic lifters and stock valve train ?