Good Link Bakat shows a cheaper alternative
the only thing is to get a start up kit and have
a day like a cruise day where all the single
carb/efi can be modded or to send our throttles
or carb section for someone to do it.

on a similar note...
I would love to combine all these technologies
and even the Singh groove to see the results but
would need a home dyno or exhuast readings equip.
On the volvo forums they swear by the singh grooves
and some suzuki people also running very high comp.

In the 70s my uncle exp. w/ threaded inlet ports
and threaded manifold 3-5cm before going into
the head ports and swore he had better response
and burn with otherwise stock carb setups.
I cant remember what its called though.