Fuel injection

check out Uncle Tony's vids, 3 pertinent near the top 

EFI has come a long way since the first 1980's stuff. The TBI systems are simpler and good matches for an intake which has very good port distribution, very balanced port flow. But virtually no single plane intake has that kind of great port balance, so TBI isn't the best choice for a single plane.

At that price level, SEFI is much better than a TBI system. But do shop around, the costs are not cheap and there are many brands etc. I've found that a typical 4-hole throttle body is above $600 alone, which is my direction for my final 351C build(port injectors). Running the system is possible with multiple different PCM's, there are way more brand now than 20 years ago etc.

I like the idea of a popular 90's OEM type EFI(EECIV), using a PimpXS PCM. Those have been about $1000 and plug into common Fox Mustang 5.0 wiring. They have a lot of support and can handle MAF or speed density, SEFI of course. I haven't looked into more details than that, top shelf features like traction control may be possible but not with those oldest type Ford EECIV systems. If you wanted more options then you end up looking at Pro M or other higher cost systems.

I haven't looked for any kits made for older engines or carb intakes. Most EFI stuff is aimed at newer existing EFI engines. The Pro M kits are over $2300 just for the operating system and wiring. The Holley similar kits are above $1200 give or take. They all have varying features and options that add more cost.

That's why I prefer an OEM control system if possible, it will cost less in the end IMO, given a quality tuner expert. That's why I like the idea of tuning done by the man who runs http://forum.efidynotuning.com/

He can handle most OEM Ford computers up to at least 2014. I could piece meal kits to run my SUV project with a SBF and 6R80 trans. But the stand alone controller is $1500+, then a kit like Holley is over $1200, and you still have to build a wiring harness and get it tuned. With the tuner from efidynotuning I can use a used 2014 F150 PCM to run both the SBF and trans. The cost will be the $90 I paid for the used PCM, wiring that for that trans will cost near $300, plus COP extra for $300 or so, and the same tuning cost, which looks to be $450-$300 depending on how many project vehicles I get help with(cost drops after the 1st).

For an older engine you might do better like with my 73 Ranchero, which will have a carb type intake. A speed density EFI system allows you to use a popular round air cleaner, instead of a MAF system that requires the big inlet tube and elbow at the car type throttle body. So with mine I should be able to use a common Fox Mustang type engine harness, used or new depending on your budget.

I plan to be able to wire that into my 1973's engine bay, buy the intake with injector bungs in it($700+ for just the Funnel Web intake for a Cleveland), and run it with a PimpXS computer. Those still cost around $1000 or so, and can be tuned by most good experts who are used to Ford EECIV and similar EFI systems. Those I gather can have a trans controller added to run a 4R70W trans(but $400ish with not many reviews); so for a 4R70W the Quick Shift 4(or 2 if you like), the cost is $700+ more. I see those costs as much better than a high end Holley or Pro M, depending on what features or air cleaner(speed density versus mass/air systems).