"while I'm there".., Engine out..what to change? Options

[TRS63]

Hello all,

slowly I am coming to the point of thinking about putting the engine back..but now is also the point for some preventive maintenance on it!

The start:
-engine is the original 1,8l with L-Jet
-it worked all good until I stopped it and removed the engine for rust repair last August
-fuel pump is approx 2 years old

What is planned:
-oil change of course
-oil+air filter of course
-all fuel lines, engine side but also the ones in the tunnel (stainless steel ones) and under the tank

I don't want to invest so much as it was a good running unit and I don't want to overdo. But I want a reliable car and more than that as much safety as possible (especially fire-risks).
I am also unsure what the future will be : carbs or modern FI with ITBs ? I am missing the clean look and admission sound with the current setup. So no unnecessary invest in the L-Jet. What is sure: I will stay in the future with a 4 cylinders (but probably a bigger one) for weight reasons.

-->do I need to change injectors sealings ? If yes, which ones?
-->something else ?

Thanks for the inputs

Antoine