You won’t know how things are going to land until you attempt to fit things.....as you already know, those non-flanged bearings will never work....that’s got to be the first order of business, then, attempt to land your worm gears, get all of that set up, and working properly.......then worry about dog bones, I question that flywheel, it’s a very tight fit in a MTH with the stock 30mm as Lou I believe pointed out to you earlier...I’d be careful altering motor mount location if the flywheel doesn’t clear things, you may wind up with body fitment issues, and that’ll be like trying to cure a mosquito bite with a shotgun...think things through, and you’ll be ok.....biggest issue I see is making sure you’re on the axial centerline of the worm shaft/worm wheel when you set your shafts, so the worm shaft don’t eat your worm wheels for breakfast.....the shafts are as hard as darn it, the worm wheels are much softer, and they’ll give no warnings they’re be eaten alive...
Pat
