[SS427]

Picture 1969, you go to your dealer and purchase a brand new 1969 SS396 Chevelle. This would be considered Day 1 so to speak. The first day of ownership. On day 2 (figuratively speaking) you remove the smog, add a Hurst shifter, headers, Cragar SS wheels, ladder bars, Sun Tach, etc, etc. That is what is considered Day II today. These parts to be era correct should have been manufactured somewhat close to the cars build year.