first thing I'd do is rotate the drive shaft 180* on the rear yoke. If you want to check the DS balance you can put a hose clamp around the drive shaft and rotate it 45* at a time and see if it changes things. try it at the rear joint and if no joy, try the front joint.  As Scott said, you're spining the shaft faster and harmonics are a bitch.

yeah, I got some of that.

the 59 fords came with the transporter. I played with the cars but never the transporter because you couldn't separate it from the cab. The colored glass insulators are telephone and telegraph, some going back to the late 1800s. The solid ones are porcelain and used for electrical power.

I like motorcraft TA-31 im a Big believer after i sealed a pinhole in the radiator with water still in it
Color werry close to Aluminium easy to take apart. Even get british motorcycles to stop leaking
Sealed a crack in a board on the boat

Yeah, but the real test would it stop an oil leak on a Harley?

Since were are being all technical and such, flys don't shit, they puke. They have no assholes.

everybody said that about intakes 20 years ago but try and find an OEM that isn't. Time will tell.

check on some cycle forums. see a lot of bikers wearing shoeis

Tuesday my local Ford dealer announced that after 90 years in business they are no longer a Ford dealership. Ford is forcing all dealers to spend well over $200k on EV tools. For the last 2 years the poor guys couldn't get vehicles to sell, then throw in the strike and price increases on top of that. I know of two other small town long time Ford dealers that also threw in the towel. If I'd knew this 6 months ago, I'd a bought a new Honda instead of a Maverick ( which I love btw). I see another bailout in the future.