RLWP

You have three Shredded Wheat for breakfast then? I'm only just strong enough to lift the expansion box, having a manifold waving about on the end would be - challenging Richard

The stud won't have gone through the pushrod tube, it might have broken into the pushrod tube hole in the head.

Have you been mis-sold PPI?

I have seen this before, it's oil coming from above the head gasket - presumably from leaking down the outside of the pushrod tubes It's annoying, not terminal Richard

What's your exhaust like?

If what you bought is an aluminium cased gearbox, the case is the same as your current one. The reduction box comes off the back very easily, and with the top off the box you can remove the clutch pack, rear bearing and output gear. Swap them with the ones from the 2:1 The alternative is to jack the back of the engine up and pull the whole gearbox - which is quite heavy Richard

I'd want to keep a pair of gears together, there's no guarantee the tooth profiles are the same. On reflection, I'd swap the clutch pack, shaft and rear bearing from one box to the other. That would save having to pull the gear

Not really. CAD is an electronic 3D drawing board. The design still comes from the mind of the designer

It is easier to swap the reduction box and output gear than to swap the whole gearbox

And presumably what it cost you to get that knowledge if my experience is anything to go on

And a painter?

Last time I was on Albion, the engine seemed OK. Chances are she's getting a bit tired and in need of a decoke. If you check your manual you'll find the recommended frequency which is in the hundreds of hours - not the same as a modern car Richard

Soot? Poor combustion/ long time since injector or pump overhaul/ leaking valves Oil? Piston rings/ worn valve guides Richard

Top one is full of soot, the bottom one is full of oil

Not exactly. Most of the cost of construction is in the bow and stern, the bits that are curved and need time to make. Straight sections of boat are much easier to construct and therefore cheaper Richard