Soda blasting also good for clearing out hidden secret passages and bleed holes. Scrubbing removes bulk of deposits, but can leave little shrapnels around.
EFI conversion requires lots of electrical fabrication skill and programming knowledge to do optimally to at least match carbs in performance.
Had one guy come to my tuning shoppe complaining about MoTeC system he got off eBay and how it wasn't working. To build harness, he didn't even crimp or solder wires to terminals. He had just wrapped wire around terminals, covered it with electrical tape around whole thing and jammed en-masse into connector housing! Then he wondered why half of them pulled out when pushing connectors together!!!
