Not necessarily "bigger", but a better
lift pump. Such as an AirDog or FASS system that can move fuel from your tank to your injection pump more effectively. Now, I don't know if FASS makes a compatible system for the first gens but I do know that an ADII can be used for them. I believe using onr for a 2nd gen 12valve will work just some grinding/modifying is needed so it can fit the VE. I know there are some lift pumps that you can mount to the engine and run off the belt but I'm not educated enough on them to tell you much more.
As for getting full power, I'm pretty sure you're injectors are doing their job perfectly. Just know that if you're constantly hot-rodding around your lift pump will fail and in time so will your injection pump. I would higly recomend getting a fuel pressure gauge to see what you're running at idle and WOT to be safe, then take it from there. Good luck man
O do post the vid, I'm a huge fan of the first gens