I'm making more progress

I've now sorted the heater problem. I just bled all the air out of the cooling system. I removed the filler cap from the radiator, started the engine and gave it a bit of throttle and topped it up then I replaced the filler cap. Result! A warm interior now. Turning my attention to the manifolds I've got most of the nuts off. Just one more to go and then the exhaust manifold can come off. I know why it was blowing in the first place. When I fitted the exhaust maifold I'd sheared one of the studs but I hoped I'd get away with it. Obviously not. Hopefully the stud should come out without too much trouble. What goes in must come out! Once I've got my centre bearing I can get the propshaft sorted out and on the car.