i recently bought a TPI from an 85-87 camaro (9 injector) which i plan to use the newer speed density pcu and bypass the #9. i was told it came off a 350 but it was on a 350 truck for a while and dont know what it originally came from 305 or 350. i dissasembled it completely but i dont know how to tell if the injectors are from the 305 or 350. there are numbers on the injectors but nothing about lbs/hr does any one know how to tell the difference??