Join Date: Feb 1999
Location: Vermilion, Ohio
Without the original engine, build sheet, POP or other dealer documentation, one never really knows for sure if their 68 Z/28 is the real deal. All the things mentioned above (except the rear bumper guards maybe...never heard that one before) are indicators but could have been added to a base model...although the E70 tires sticker in the glove box is a real indicator that some may know about. Another indicator that were standard on the Z is a multi leaf suspension (I think 4 or 5 leafs). If the car has the factory tachometer (optional)it should be the high RPM red line (only available from the factory on the 396/375 HP and Z/28 cars). I think the redline is either 5700 or 5800. (I am at work and my reference material is at home and my car is in storage so I am going from memory) I think the base tachs either redline at 5000 or 5500. A guy in my neck of the woods swore up and down he searched the country over for a reasonably priced 68Z and found one with the incorrect motor but was sure it was the real deal. Had it shipped (he lives in Ohio)in from California he said. Later in the day, I went over and looked at his car and the tachometer was a base RPM one so either somebody replaced the correct one with the wrong one (not very likely) or he has a Z/28 clone...more likely. I did not burst his bubble when I saw him later in the day. If he thinks he has the real deal...no harm no foul.
I know from where you are coming from because I have a 68 RS Z/28 and have all the above mentioned equipment but still do not know if it is the real deal because I have no documentation or the matching numbers motor. It is a 302 and has all the right equipment so if it was cloned, it was done right, and knowing that is the best I can say, I am OK with that.
There is a book out by Jerry Mxxxxx somebody that gives alot of info for documenting 67 & 68 Z/28's. I am assuming most of it is accurate as I have not heard or read any major negatives on this book.
67 SS 396 Chevelle 350HP 4speed
70 SS 396 Chevelle 350HP 4speed
68 RS Z/28 302 350+HP? 4speed