The 42's are up & running. But both the T and 90deg banjos leaked a lot of fuel. So I nipped up a bit more. I'll check them again tomorrow when vapours are all gone. 

 

Thanks Matt. I'm pretty happy how it's turned out. Just need a throttle cable bracket then some fun :) Also discovered (once the old manifold was removed) head has been mildly ported and polished.

Sounds ahhh, epic :D I flattened off the machined edges of banjos and sealed with Epoxy resin. No leaks. Peter, Dave from Recarb was most impressed with your port/ polish work on the manifold :)

Hope you have a better run this time.
 

Maybe I missed something but why did you change from the twin 42's to the 38/38?

Only a few hundredths shaved off unfortunately, with a PB of 16.22 (last was 16.25)
Three runs, with the first two not really worth counting because the float level wasn't set right and the fuel bowl ran dry half way down the track! So I adjusted the float level and ran one more which was the PB.
 
The only advantage I can see of having a 38 is the instant throttle response. Wide open throttle it pulls only a fraction more than the 32/36 but the 32/36 is much friendlier in traffic and uses less fuel. (I'm not concerned about fuel economy but just making a point about the differences)
 
I've concluded that the head on my engine just has no more flow in it. I think the 38 will respond better with bigger inlet valves & some porting. So that must be the next logical step right  ??
 
 

Progress has been a bit slow out in the shed. I've heard many people say putting in a 5 speed is time consuming, but it's for all the reasons I wasn't expecting. Like carpet, redoing my seat mounts and prepping/ repainting the floor.
 
The welder was a much needed tool and so far it's going alright. I'm using gasless wire which welds hotter than using argon, so I've only done spot welds. Sika11FC under the tunnel and on the inside edge of the gaiter holder to keep all water out.
The shifter hole was something I researched a bit before tackling, which I think paid off. Doing it this way is tidy & reversible, if you keep the cutting.
 
 






 
And this magic hose armour to protect brake booster hose that runs behind the block
 

 
 
 
 

Thanks Bacca. I used rolled steel ( panel steel) for the jobs, I think that's also played a part in the result. Good luck :)