You are the second person to suggest this. I am pretty sure that the blue and silver is correct, but I want to get it right so I look forward to other comments. My original springs are pictured below and were blue and silver. Also, I bought a spare correct intake that was fully dressed and included correct manual transmission carb. It also has gray under blue carb return springs. Someone else chime in here. Let's get this right Here is my original set up before the madness started.