Okay, time for some really basic questions about the TII fuel system.
I'm building a non-Mazda car (Austin Healey Sprite) with a TII engine swap.
Attached is a schematic of my planned (basic) fuel system.
I want to keep things simple, with modest boost and power (200-250 hp) and good reliability.
As a result, if possible, I'd like to keep the stock fuel rails and injectors.
I'd also like to use the stock fuel pressure regulator, but we'll see if that's possible.
Also, if it matters, I'm tentatively planning on pre-mixing fuel.
The parts I have to fab/source are mostly those on the left side of the schematic (E.g., fuel tank, pump, filter, level sensor, and supply/return lines).
My first round of questions are:

1. Do I have the inlet and outlet routing correct in the photo?
2. Am I missing anything from the schematic?
3. What aftermarket in-tank fuel pump is popular and recommended for reliability?
4. Recommendations for in-line fuel filters?
5. Recommended fuel supply and return line size(s)?
6. If I did go with an aftermarket pressure regulator, what is recommended?
7. What are the size(s) of the stock OEM injectors, and what HP can they comfortably support?

Any and all advice is greatly appreciated.
Cheers!

Simple schematic of what I'm planning to build for the fuel system

Photo showing fuel rails.

 

I know you said you want to keep things mostly stock, but I would STRONGLY recommend taking this as an opportunity to modernizing the fuel system with better injectors and a better FPR at the least. It'll cost a bit more, but the improvements in quality and consistency should be worth it.

I'm not sure what the stock injector sizes tor a T2 are (I'm an FD guy, the FD came with 550/750 injectors), but if you're running an aftermarket ECU then you would be able to run the ID1050x injectors in all slots to have a good idle while still supporting your power goals.

As for FPR brand, a lot of people run aeromotive, but TurboSmart is going to be the highest quality.

 

the T2 injectors are 550cc each, and depending on the AFR you try to run and boost and such are ok up to about 250hp.

for a fuel pump, the stock T2 pump is ok, but the FD or the Walbro drop in ones are popular, but keep in mind they are drop ins for the Rx7, and it might be easier for you to run some kind of external pump.
255 Liters per hour is kind of the ballpark

for a filter Mazda uses 8mm hoses, and i'd pick an EFI filter with 8mm hoses and was easy to get at a parts store. obviously the FC filter would be fine, but there is probably something easier to get.
maybe a MIata filter? they come with the bracket

 

fwiw, recirculating fuel systems are the old fashioned way of doing it.
.

 

"Old fashioned" I am fine with. "Complicated," "expensive," and/or "inadequate" are what I'm avoiding.
Can you explain why non-recirculating is better in these regards for my application than my current plan? Genuinely curious...

 

its one fewer line to run/hook up. Mazda keeps this simple, and they just put the pressure regulator in the gas tank

if you're running a stock computer its not really an option though.