Having a clear out and have 215mm 4 pin flywheel for sale Ring gear in good condition £45. 10 mile north of Durham or can send by courier at buyers cost
They are different, a type 1 with four locating dowels has a big centre gland nut whilst your type 4 has five bolts about the centre.
The biggest (clutch) T1 flywheel, perfect for higher power engines to retain the nice easy clutch action.
Hi If Dustrat' s flywheel is not right for you, I still have my used but OK flywheel, clutch and pressure plate of my type 4 /2ltr if you're interested. https://thelatebay.com/index.php?threads/lots-parts-wanted-73-westy.94691/#post-1856080
Having a bit of problem putting pictures on forum so have Whats app them to a friend, Daniel,and he is going to put on forum on my behalf