1967 Coupe Glass Codes

[Steven B.]

Having received the new 67 JG, I decided to check window glass on my coupe. I have always been a bit curious as well as skeptical. From what I have been able to discern, some of the glass does not fit the glass codes. With the exception of the front windshield, the glass is all EZ Eye Float, Soft Ray, Safety Flo-lite with LOF , AS-2, Solid Tempered, DOT 15, M74. The code dates are: drivers wing-UL, drivers door-XL, Rear-XC, passenger wing-GZ, and passenger door-GZ. I am reasonably sure of the date codes as I tried to be very careful about determining the letters. With the exception of the passenger door and wing, I am wondering if some of the glass has been replaced at some point. According to a web site I found that gives glass codes other than 1967, the rear window was manufactured in '63' or '76', the drivers door and drivers wing '61' or '74. Did midyear replacement glass carry a date based on manufacture date? I'm guessing yes, and some of my glass is replacement. Does anyone know of any anomalies? I have the judging papers from a regional in 1991. The car earned a Top-Flite. Without digging out the judging sheets, were they concerned about glass dates back then? The previous owner had the car for 20 years and put a total of about 2000 miles on it. He bought it shortly after the regional, and I doubt that he had a reason to replace the glass.
Thanks for any information.
Steve

[Gene M.]

Re: 1967 Coupe Glass Codes

Steve,
I assume you want you glass to be accepted in NCRS flight judging. Well let me tell you what was on my very early '67 convertible. The windshield glass was dated late '65, well out of the NCRS acceptance. This is clear glass non tinted. The previous owner of about 33 years said it was never replaced. Upon my removal on the windshield I believe it was original. All assembly showed typical to GM UAW craftsmanship. But knowing the judging is done per the book, I decided to replace it. The rest of the glass, all non tinted is within the prescribed dates NCRS accepts. I am under the impression that less used parts such as non tinted glass was left to production stock and newer supplied parts put in front of it. At some point the older stock got used in production months after typical assembly time period. Thus the exception is just as original as the norm. But fighting city hall is a losing battle so I replaced it with a "good" dated piece.

[Terry M.]

Re: 1967 Coupe Glass Codes

Gene, as I know you know, it comes back to Typical Factory Production (TFP). Your glass, and the OP's may be original to that car, but it is not typical. End of story. No reason to fight City Hall; there is nothing to fight. If an owner believes strongly enough in the originality of a non-TFP item by all means stick with it, but expect a deduction. We may down the road discover evidence that removes the non-TFP designation, and you will be in tall clover; but unless and until that happens there will be what I hope is the appropriate deduction.

In 1989 or 1990 I stood at the Bowling Green Assembly Plant and watched the glass installing robot place a standard windshield on a ZR1 that was being built for my friend who was standing beside me. On the way home we got to talking about that installation, and he asked me if I thought he should request they change the windshield. I advised him against it. He has passed and his widow has yet to bring the car for us to judge, but if/when that happens I hope to be there to testify to the originality of that non-typical windshield. I already know what the results will be, however.

I had a discussion in Frisco with an original owner who has a Canadian (McKinnon) built starter on his car. He knows it is original to his car, but I had to explain to him that he will receive a deduction because that starter is not TFP.

[Gary F.]

Re: 1967 Coupe Glass Codes

These are the accepted year codes for 63-67 Corvettes. 1963 / C........1964 / G..........1965 / J.........1966 / A.........1967 / Z..... This is the second letter designation in the 2 letter code. The first is the month. Glass was produced by calendar year, not model year. All the glass matches on my 63 except for the windshield. The code on it is VI (December 62 ) which is 2.5 months before my car was built. The year code designation changed every calendar year, and at the beginning of the 13th year, they started it all over again. Example.....C was used in 1963, and again in 1976.......Just sayin.......

[Gene M.]

Re: 1967 Coupe Glass Codes

[QUOTE=Terry McManmon (3966);681413]Gene, as I know you know, it comes back to Typical Factory Production (TFP). Your glass, and the OP's may be original to that car, but it is not typical. End of story. No reason to fight City Hall; there is nothing to fight. ............

The Typical Factory Production (TFP) is one of the basics that NCRS allocates point deductions. If one wants one's car to avoid deductions the guide lines must be adhered to. This being a small thing 20% in the CDCIF area of date is not much point assignment. But say for the record everything on this original windshield (as I think it did) looks copastetic less the date. There is NO way I could prove it is original to the car and convince the judge. Thus by having the windshield with the date failing in the TFP window it becomes a non issue. There is no stigma is assigned to the car because nothing is outside TFP for car and it's build time.

Now if this had been an original tinted glass it would still be in the car because configuration is a much greater point valuation than the date. Not everybody is going to take the same path restoring one's car.

[Michael J.]

Re: 1967 Coupe Glass Codes

I was always curious about the windshield and driver's window of my '67. They were dated 1972, while the rest of the glass was properly dated for a Feb. 67 build. When I was able to find the previous owners, I found out the car had been hit on the driver's side, and those pieces of glass were broken out and replaced in...you guessed it, 1972. The fender repair was also explained, glass many times tells a story.

[Terry M.]

Re: 1967 Coupe Glass Codes

[QUOTE=Gene Manno (8571);681463]

Gene, as I know you know, it comes back to Typical Factory Production (TFP). Your glass, and the OP's may be original to that car, but it is not typical. End of story. No reason to fight City Hall; there is nothing to fight. ............

The Typical Factory Production (TFP) is one of the basics that NCRS allocates point deductions. If one wants one's car to avoid deductions the guide lines must be adhered to. This being a small thing 20% in the CDCIF area of date is not much point assignment. But say for the record everything on this original windshield (as I think it did) looks copastetic less the date. There is NO way I could prove it is original to the car and convince the judge. Thus by having the windshield with the date failing in the TFP window it becomes a non issue. There is no stigma is assigned to the car because nothing is outside TFP for car and it's build time.

Now if this had been an original tinted glass it would still be in the car because configuration is a much greater point valuation than the date. Not everybody is going to take the same path restoring one's car.

I blew this one on the board several monhs ago, so now I tend to remember:
No CDCIF for items in the Standard Deduction list including glass. I am sure there is still a deduction for date and it may come out to 20% or close to that, but for glass, tires, battery, motor, stainless items we look to the standard deductions.

[Gene M.]

Re: 1967 Coupe Glass Codes

Terry,
Correcto, Yes no CDCIF for items in the Standard Deduction list. But the glass portion does follow pretty close for deviations as CDCIF does. Not so sure about the others (tires, battery, motor, stainless items) may be quite a bit more.
Clear glass vs the current available tinted windshield is passable while tinted does not cut the mustard. This assumes the DOT markings are not visible and LOF stuff is correct. Side glass is a different story.

But I think you get the gist of my point...... "reducing the chance for deducts" by not being outside TFP.

[Martin M.]

Re: 1967 Coupe Glass Codes

I guess it all comes down to how much you want to spend for the points

[Michael J.]

Re: 1967 Coupe Glass Codes

True, I have seen some very high prices on original shocks, tires, and air cleaner filter elements.....