I suggest getting your wheels balanced
And why are you driving that Chev at 70MPH?
Most people are right-handed, therefore we shake hands with our right (strong) hand.
Get you front end aligned, that should take care of the shakes.
bad/partially blocked catalytic converter. - kind of a rotton egg smell, right?
Whether you are right or left handed, the proper custom is to shake with the right.
warped rotor
Check the motor mounts.
There does not seem to be a country that claims it is rude to shake right hands. Many countries agree that it is rude to shake left hands including most Muslim countries.
Yes but as most people are right handed it maight be more prtactical to learn to shake with your right hand. (That is my opinion only)
The engine may spit,spudder,miss,shake at idle. Then all of a sudden straighten right up and run like a new one. Back and forth.
yes
My guess would be wheel balance.
Could be Warped Rotors. Have them checked.....