99xcss4
92g-94c frank'n (truburban) K-2500
where are you getting your info for the tbi injector rates I have a 94 454 tbi and it came stock with 90lbpr injectors and use a fuel pump that operates between 28-32 psi I do not know what fuel pressure regulator spring is in it I have also read that old 454 tbi engines came with 80lbpr injectors and used the 4.3 305 and 350 fuel pump I do not know what fuel pressure regulator spring was used in these