Ulf! I think I know the feeling! It looks like there were never any suspension parts replaced and the interior and body was all original. the engine compartment, interior and body will not remain that way! The suspension came apart so easy!
I wish that every car you dis-assemble was that way. It makes Life so much easier.
Re the headers I did some more measuring and I'm almost sure that Djakken was right. Spitfire headers is the way to go.
'I'm not sure but does anyone know what manufacturers that did headers for early A:s except fenderwell headers? What I know of is only Doug Thorley and Spitfire. Hope fpor any help!