Hello everyone i'm new to these forums but i'd like to get straight onto the point if thats okay.
Got an 89 civic ED3 with a d15b3 carb.
Found a Delsol with a JDM 1.5 Vtec d15b for cheap as a donor car for the engine + wiring harness and want to swap everything from that car into my ED.

Here are some facts:
- Cant use another ED/EF thats already FI since they dont exist here apart from the dohc ones that are super expensive.
- Want to go as low budget as possible.
- Wont sell the car and buy another (it was my dads, had it since new).
- Engine is on its last legs, 250k+ miles, oil consumption is at 1 liter every 2.5k miles
- Country laws wont let me swap in an engine thats got more than 30% of the original engines power so cant swap b series or the dirt cheap h series ( in my country you can find a bad condition prelude with 500euros, while similar shape EF sedans(EDs) go for 700-1500 with a 1.5 carb :/ )
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I found a guy in another forum that used an out of tank fuel pump for the conversion on his EG, he didnt mention anything about fuel return lines though, and i was wondering
(1) if its actually possible?,
(2) To my understanding carbs don't have return lines?,
(3) If not can i weld a fitting on the fuel tank for the return?

Thank you for your time and thank you for your help, I really want to keep the car and i dont think its worth to swap in another carb engine in it, i use it as my DD.