Hi everyone, I'm new to this site. My friend and I are working on restoring a 1975 Mercedes 450 sel V8 4.5 liter. The fuel injectors weren't working in some of the cylinders, so we got some out of the salvage yard from a 1976 450 sel. Will these injectors work? (we haven't pulled the old ones, previous owner said the injectors didn't work) If not, what other year injectors are compatible? Thanks!