Need to find a supplier for Mangoletsi inlet manifolds. Demon Tweeks do them but there are others, may get a better deal as 'tweeks arent always cheap. If your using the later head with the big injector cut outs you'll have a problem, it's the older style head, K-jet or digi type that'll be ok. The manifolds as they come need a lot of work to open the ports, if you dont, you'll gain next to nothing from the carbs.
when i was looking into running carbs i spoke to a company in south africa who were miles cheaper than anyone in the uk... http://www.manifolds.co.za/ they are the lads...