Thanks for the comments, but from now on it all gets a bit ..... well ..... dirty....
So for those of you upset at the sight of anything other than clean, plated, powder-coated engine being assembled in surgically clean environments, please look away now.
Engine Games - Part 1 Preparation for installation (part 1)
First job was to reinstall the refurbished distributor fitted with Pertronix that had been checked by Neil Bainbridge on his magic roundabout. Advance curve to spec. Timing mark on the pulley to Z1, then off with the valve covers to find if No. 1 is at TDC. Of course not .... 50:50 chance my arse.
Anyway round the pulley once more and in with the dizzy shaft so the rotor arm lines up with the mark on the distributor body. Should be good enough to get us running. Also checked the photo from dismantling (below) and the clamp bolt is at the same point in the adjustment slot on the base.
In with the new spark plugs (NGK B7ES as recommended on here) - not too tight to allow easier crank rotation. Taking off the lower valve covers I find that at some point the later (better, bigger, higher, stronger) turbo covers had been fitted. Good.
Then to check the valve clearances and a touch of Zanussi (for those who can't remember their slogan some years ago was 'the appliance of science') Rather than faff about with the old 'bent feeler gauge down a hole' party trick that I found distinctly tedious on the swb, I have persuaded a fellow DDK colleague to 'invest' in some neat engine tools from Stromski Racing in the States. First up is the 'valve lash' adjustment tool. Basically an adjustable T mount for your dial gauge that bolts onto the valve cover mounting studs and allows you to very accurately measure the valve clearance at TDC.
First mount so the dial gauge pin is square on the flat top of the adjustment screw (and not in the slot), tighten and zero with the rocker pushed down onto the cam
then pull the rocker up as far as possible. Repeat several times to ensure a consistent reading
Most of the upper valves were 0.1 to 0.12, but a couple were 0.18 to 0.22, and one was 0.47 and another 0.56. So she would certainly have rattled a bit without this check and adjust. Got them all to 0.10 to 0.12. (spec is 0.10mm)
Covers back on and torqued to spec, plug leads refitted.
Went to refit the ring gear, clutch and pressure plate with new bolts but then found the clutch alignment tool I borrowed was for a 901 and a 915 is different (bigger diameter) B*gger - will have to see if I can get a universal tool to work or wait until the 915 one arrives.
to be continued....