No before picture, as I was too busy also draining the oil for the second time in a week to try and eliminate some of the valve train noise. Now replaced with a new K&N filter and 5 quarts of Royal Purple 10w30. Engine seems a lot happier now!
Anyway, EGR plate fitted - I couldn't shift the bolts for the pipe underneath, but the studs came out easily enough for the EGR valve.
Whilst I was there, I was looking for some of the causes of rattling. Spotted this on the exhaust manifold:
I don't know if this is intentional or not - there's about 10mm gap in the manifold flange and the nut was missing from the stud. It sounds like it's blowing pretty heavily as well, so...
That's a 6-1 manifold with a 2.5" collector, ceramic coated. The welds aren't the prettiest, but it seems fairly good quality. Because I have a 1978 with the round manifold ports, there really is very little choice available.
I'm happy with it, so I'm going to arrange the car going into the shop to get a new 2.5" stainless exhaust fabricated.