Don't always go by the service manual in these cases because most modern gasket and silicon sealants where NON existant back then.
My theory on old antique motorcycles stands w/ tractors too. Our bolts fit that class.
Yes to all, where needed as needed.


Gooday
Jim

small wheel moves by fire and rod,
big wheel fires by the grace of god,
everytime that wheel turns round,
bound to cover just a little more ground.