What style fuel injection to use

[luvbowties]

Been pondering converting my carb'd, 1996-1998(?) stock 5.7 Vortec with headers to fuel injection. My truck is a 1966. [I've got in storage a complete tbi system from like a 1989-1990(?) pickup with 5.7 engine--all sensors, wiring harness, & computer. Guess I'd have to call it a 2-bbl f-i unit.]

Anybody converted a stock 350 to fuel inj. and been happy with it? Also, another question is what does it do to power and useable torque range? Present power is really good for what it is, and it starts & performs flawlessly, cold and hot. MPG is about what they all do when set up with carb & headers: 11.5 to 14.5. Expect a long I'state run would do better than those numbers, as I have a 700R4 and 3.73 gear, and have the lockup functioning superbly.

I like the simplicity & clean look of the newer all-in-one units that include the tps, temp sensor, and other sensors built into the tb-unit. I also like the self-tuning capability of some systems, as I do not care to design my own mapping/tuning.

I also like the cheap cost of using a donor-tbi unit like I have--or a similar one from a donor car that may deliver better performance/economy than the exact one I have. Really don't wish to spend $2-$3K on one of those all-in-one's! But if they really "deliver the goods"--as may be attested to by some of our forum members who have used them and are happy--I may just bite a $2k-bullet.

A general question: what happens to the original power & low rpm torque in a 1996-1998(?) 5.7 Vortec when going from the 'spider system' to the 4bbl-and-Edelbrock Performer RPM? I am curious if changing to carb usually increases or decreases power and low-end torque? I'm sure driveability and economy will be equal or prolly better; just don't have a clue about torque/power.

Any experience I will appreciate you guys sharing with me.
Thanks,
Sam