After having more issues with leaking carbs it ended up being the float valve o-rings.
I priced a set of four delivered from the USA at $125 AUD!
So, I went to Supercheap Auto and bought 2 packs of assorted o-rings for $12 and issue solved.
I hooked up the throttle cable too which was actually pretty easy in the end.
I also bought original rubber manifold mounts and fuel pump to ensure I'll have no more fueling issues.
It runs well up to 3/4 throttle wher is seems to die off so i'll take off the carbs for the 12th time now and just make sure the float heights are correct and then take it to a mechanic mate to get them sorted once and for all.
Whilst it has taken a lot longer than anticipated I am learning a lot.
Cheers,
Matt