I pulled my son's heavy-clutch engine out with the 5-speed attached. We redid many things with the engine out, including replacing the fuel line splices on the firewall. It was a breeze because we had an engine hoist. A bit fiddly to do the trans. input shaft bearing (you should think about that, too), but that was the actual "proximate cause" of doing any of the work. We found lots of stuff to do, and discovered that the P.O. had left off the flywheel cover and as a result enough dirt/oil paste had accumulated on the clutch friction disc that one side (only) had been worn down through the wear indicating grooves in the friction material. All in all, it was a rewarding experience and a good time was had by all.
Alfisto Steve's pointer on lowering the tranny mount to gain access at the cam gear area for seal replacement is a great one for in-place work. The "rope trick" applied to in situ valve seal replacement might be worth considering unless it is exhaust valves which are the problem area and they were done with seal-less exhaust valve guides. (Stuff soft rope into the cylinder and then manually press it against the cylinder head to keep the valve from dropping when the spring and keepers are removed for seal access) But you might find some usable heads to have the seals re-done and maybe touch up the valve surfaces, and then simply swap out the heads. I might argue that you should have the starter rebuilt at the same time, pulling the engine for ease of access to everything.
Complete engine gasket sets are available in the US for prices across the range (from under) US$150 (Spanish ADJUSA -- may be Milano 3.0 version) to ~US$600 for OE Alfa.
Michael
Alfisto Steve's pointer on lowering the tranny mount to gain access at the cam gear area for seal replacement is a great one for in-place work. The "rope trick" applied to in situ valve seal replacement might be worth considering unless it is exhaust valves which are the problem area and they were done with seal-less exhaust valve guides. (Stuff soft rope into the cylinder and then manually press it against the cylinder head to keep the valve from dropping when the spring and keepers are removed for seal access) But you might find some usable heads to have the seals re-done and maybe touch up the valve surfaces, and then simply swap out the heads. I might argue that you should have the starter rebuilt at the same time, pulling the engine for ease of access to everything.
Complete engine gasket sets are available in the US for prices across the range (from under) US$150 (Spanish ADJUSA -- may be Milano 3.0 version) to ~US$600 for OE Alfa.
Michael