The Holley 2300 EFI system is $850 for the base kit and FiTech has a similar offering for $795. If you have a stocker slant 6, one of those is your best bet.
Both of those systems are still a TBI into a wet manifold. Port injection will be much more efficient, and potentially make more power.
As I said earlier, fine if you're just looking to enhance driveability, but not the best choice for an inline engine. Especially if you are willing to/have the ability to play around.
