There was a service bulletin in 1994 ( 27 years ago ) to move tell tale to top of the block.-----The latest factory water pump kit has parts / instructions for this cooling system modifications.
The alignment pin is tapered and must be driven out in the direction that the carburetors are.----Then the crankcase falls apart.----It was clearly posted earlier that you needed a 12 point thin wall 5/16" socket !!
The tee is shown on the parts diagram.----Diagram shows one outlet from primer valve to be capped.----Perhaps the primer valve was replaced and someone was confused by the simplicity of this valve!
There was a service bulletin in 1994 to move the tell tale fitting to the top of block.----So 27 years ago.-----The latest factory water pump kit has bits / pieces to make cooling system modifications.