One of the reasons I have a ZR-1/LT5 is the LT5. An amazing engine which I found out once you treat it with a bit of respect in a restoration/maintenance it never quits (runs forever)
I replaced the complete secondary vacuum system on the LT5s for less than $100 (all those old rubber connectors are usually the issue as well as those old original injectors).
Lets not forget the old Fuel Pressure Regulators also replaced by Phil's new Fuel Pressure Regulator that can be changed out after initial installation without removing the Plenum (the original Fuel Pressure Regulators usually are a bit rusty inside)
I would never eliminate a functional Secondary Fueling System which is the most unique features of an LT5 (The Full Power Key and all that Dual Fueling associated with the Full Power Key).