Buy the club leads. I have the same material on my 1850, good stuff.
You're right, not something be cheap on. Anyway I have it running properly now, idle around 850 and the carbs are balance according to the flow meter. So all is well in my world.
The noise in the gearbox/overdrive just seems to be the propshaft attachment at back spinning, screwdriver on the box/overdrive reveals it is surprisingly noise free. No whines, no crunches. No doubt something else will go wrong as I rebuild it. Still need to put the prop on, a bit of welding and fix the brake lines.