hey Matt!
FI and timing are totally different systems. they can be built to "assist" each other but don't need to.
check out
www.SDSEFI.com for a bunch of EFI info.
you do NOT need an o2 sensor for EFI.
you can run a EFI with as little as a throttle position sensor(TPS)
it is quite helpful if you have a MAP or a MAF. (two different ways to sense load)
I have recently completed a fuel injection system for a 2443cc SCAT(similar to a VW) utilizing the SDS 3-F system. I hand fabricated the intake manifold. It works great!
if you are going to stay with big 3 EFI equipment leave it on the motor it came with. if the motor you are 'playing' with had mods or never came with EFI go with a turn key solution(Holley projection or similar) or if you want to get creative and have the patience to learn to program a system go with the SDS or if you have a lot of money ho with the MOTEC system.
If you have any questions let me know!
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Peace.............BartG
78 Chero
360 2v, 400 QT with low
almost drivable:
4" skyjacker
33x12.50 BFG KO's
Thorley headers, 3" exhaust
Infiniti power leather seats