I'm considering another project (yep, added to the six I already have on the drawing board!) I have a 1951 GMC 1/2 ton frame that's just begging me to turn it into a doodlebug tractor, along with a couple of crash box 4 speeds and a vacuum shift 2 speed rear axle. I've also got a few Mercruiser 4 cylinder boat engines, the same design as the Chevy II 4 banger from the early 1960's. 4 cylinder engines in general have a bunch of oddball harmonic vibrations that tend to unscrew bolts at certain engine speeds. I'm wondering if, and/or how much weight would need to be added to a flywheel or a harmonic balancer to dampen out those vibrations when a bellhousing, clutch, and transmission gets grafted onto a Mercruiser marine engine? I could probably run the original marine flywheel, and adapt the driveline to some type of remote clutch assembly, I suppose? Thanks in advance for any guidance!
Jerry

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