Yes it is possible.
Update: ECOTEC powered TR4 is a reality.
I've posted quite a bit of new content on my website including a new video of my cousin's finished TR4 now with ECOTEC power. My TR6 is currently undergoing a bit of a transformation also... There is an ECOTEC in the future for bowtie6.
You can read all about this (and watch the video), at www.bowtie6.com
"The point I'm trying to make here is that with the proper tools, diagnosing FI is not rocket science. Folks make this to be a great mystery. I've heard from so many folks through the years that if has a "computer" it is not worth messing with. Adding insult to injury, I've read of folks stripping the FI system off L32′s and replacing that with a "Holley". Oh dear..."
Great quote...