Next step is to confirm fuel pressure.
Purchase this and install it at the fuel inlet. https://marine-performance-parts.com/cfmtechfuelpsiguageadaptorforgmtbi2843505774.aspx
Also pick up a schrader 1-8 mnpt...
https://www.gmt400.com/attachments/20230429_001247-1-jpg.340464/
I use a quick connect fuel pressure tester. Use Gasoila E-Seal when sealing the fuel pressure fitting.
Head on over to here and you likely will find one who can help source the part...
http://www.gearhead-efi.com/Fuel-Injection/forum.php?s=29b827bf16a1570472a99e3e5f7dc6a6
94-95 had pressure of 26-32psi vs 9-13. They also used different spec injectors.