Put the 19's back in. A FPR (fuel pressure regulator) is completely different than a MAF (mass airflow sensor).
The Holley setup might have an MAF option, personally I wouldn't utilize it, keep it SD. Very few people utilize MAF with an aftermarket ECU.
Im def keeping the SD.
A deal is only a deal if it's the right parts for you.
Using a $1500 standalone negates all of the saving and then some.
Then you may still pull your hair out installing it all and getting it to run right on top of the fact that is still too much intake.
This would have been as simple as a mass air swap, trade the intake for a gt40 (could probably get someone to give you a GT40 tubular for an RPM II), keep your 24's add a pro M meter and drive. It would have ran and idled just fine.
Now it's complicated and expensive, not to mention all this work for mediocre power gains.
Do some research on mass air meter foxes, which began in 89 and i believe 88 in California cars.
This is important information to understand before going any further.
I get what you’re saying, and I agree a simple mass air setup with an A9L and GT40 would’ve been the easiest, most budget-friendly route. No argument there. but im eletrican....sadly, most of the performance shops here only handle Holly or Mega SQ.
This is my first performance build, so I’ve been learning as I go. However, I’m already committed to this direction, so why go backwards when bolt-ons can be tomorrow's problem??
worst best case, it also modernizes the car and cleans up 30+ years of wiring.
As far as the intake being “too much,” I hear you—but the car actually runs strong. My main issue right now is idle and some bogging, which is trial and error with any project car.
You actually don't need the MAF with the aftermarket ECU. Very few go MAF with standalones. There are benefits to it, but a lot of folks tune these to Speed Density and get them to run fantastic. You can certainly go MAF if you want with the Holley.
Holley EFI is pretty popular with Fox cars, so shouldn't find any issue finding someone that can tune it. I don't have anyone I can recommend however.
E-fan is a popular upgrade. You can certainly do it now, or after the holley. Do you have any skills to wire it in now? I run a Contour fan with LMR's bracket kit, with a Infiniti OEM PWM controller. It's tied into my Megasquirt so I can control it via the ECU and really dial in when the fan comes on and how fast it spins. I've helped folks set this up with Holley as well, but the downside is you cannot control it this way with the stock ECU you currently have so you'd have to run a standalone PWM controller. Good mod after you get the holley setup, you just need 1 wire to the controller for the PWM control.
I think any Fox would benefit from a 3G 130A conversion with 4G wire. I've tested my own car and with everything running and the e-fan going, it's only about 90-100 amps total. 130A should be plenty. 200A is overkill considering you need to run much larger wire sizes than 4G if there is any chance of actually pulling 150-175A or more on the system...which I don't see happening outside of a competition stereo build.
My opinion is the 6AL is not necessary but others may feel differently. Might want to research what other folks are doing with their Holley
I'd also recommend adding a provision to put a fuel pressure sensor where the Schrader valve is and wire it into the Holley.
I have minimal wiring skills...
Thanks for the insight on the fans, i think its best before I commit to deflecting the question to the future electrician who will install the HOlly to see what route I go for wiring and PWM.
I'll have to look into the 4G wire conversion, noted on the 130A...I was leaning more towards this option.
I got the 6AL for 50 bucks, so I was thinking, what's there to lose, but I'll do more research
@General karthief
Issues I see (I'm not an expert but this is what I have learned here)
Speed Density system with the wrong parts.
Cam that don't play well with SD computer
Injectors that don't play well with SD
Cam works in a different rpm range than intake
Aftermarket heads and SD will not play well.
Remember the old computer say'n; garbage in, garbage out.
Need a better plan...
ALL
I think things are getting crossed up. I’m not relying on the stock SD ECU anymore. The Holley Terminator X replaces that, so issues like cam compatibility, injector size, and aftermarket heads don’t affect it the same way they would on the factory computer.
At this stage, I’m not chasing the perfect parts combo or peak power—I just want a solid, drivable car. My current issues seem more like something that needs to be dialed in rather than a setup that fundamentally won’t work.
If there’s something in my combo that would actually prevent the Holley from being tuned properly, I’m all ears. 
