They're Rochester injectors MPI 5235302 215 cm3/min(20.7 LBS/HR) (x.x bar)(XX.X PSI)'87-'88 CHEV 5.7L V8(IC-217) If you goto the DIY_EFI web page, there is a mondo big injector spreadsheet. Here is the link ftp://efi332.eng.ohio-state.edu/incoming/fuelflow.txt See ya, Mike