Thanks guys, I'm afraid I'm not of the Tweed Porschephile concours type! If I ever need to impress someone with a Facet pump noise, I'll slap myself around the chops with a wet haddock and 'snap out of it'.
I've assembled everything for now using the Facet pump and rubber isolating mounts which achieve exactly zero decibel reduction, but at least they don't amplify the noise through the chassis.. I'll buy and fit a rotary pump and that should make things far quieter and allow _just_ the engine note to be heard.
I've reassembled the whole front - I just need to bleed the brakes. I lent my brake bleeding kit (that runs off the air compressor) to my brother so I'll make do with introducing the wife to the delights of 'up, down, up, down..' I'll pull in my marker after she requested I make home-baked chocolate fondants last night. :-)
I've also replaced the gearshift coupling so am now heading to the rear of the car to tackle the carbs, engine, clean up that Porsche fan shroud and fix the air gaps between top and bottom engine halves. I want to get it mobile again so I can jetwash the huge amount of oil from underneath so I can more clearly see further problems (before fixing the CV joint etc).
One question I forgot to ask from a long time ago regarding the sebring style exhaust - why would the PO or original engine builder fit a 40mm ID exhaust when the exhaust manifold is only 34mm ID? I'll dismantle soon and take some pics to see if there is a rational explanation, or if that is 'just the way it is'.