The first thing to take off would be the exhaust pipe ,after you do that I would not take anything else off until you sprayed your favourite penetrating oil on the inside of the manifold as you can see the inside of the heat riser .That may be enough to free it up.I also agree with the guys above might be time to check the cooling system.If you do drop the exhaust pipe and if you don’t have brass nuts on the studs it would be a good time to change them out .
Last edited by KEVINSKI; 05/16/2022 1:15 AM. Reason: More imfo
