Has anyone gone thru the exercise of cataloging all the bolts on the car with reguard to the above questions. Is the listing in any book(s)?

 

Paragon use to sell a laminated poster with all the head logo's on it. Don't know if they still have it.

The most knowledgable Corvette nut and bolt expert I ever found is Richard Fortier. He used to own Paragon and created the poster. He sells all kinds of correct head bolts out of his house in Fenton MI.
Call him if you need anything 810-750-1472 or email
richfortier@chartermi.net.


Gary

Looks like Paragon still sells it.

https://www.paragoncorvette.com/p-35...rk-poster.aspx

 

NCRS judging manuals list them.

 

Way too complicated of an exercise. The AIM references part numbers. There are GM catalogs that describe the part. As far as head markings go, that all depends which supplier's bolts were in the bin as your car moved past that point in the assembly line. Correct finishes are another question.

That is why NCRS people are so interested in unmolested, unrestored cars. Every time they are given the chance to inspect one, they can solve another piece of the puzzle and update their Tecnical Information Manual and Judging Guide for that particular year. If you don't happen to have an expert in your corner, the NCRS is your best bet. Pay them a few hundred bucks and they'll be glad to look your car over at a regional meet. Don't expect judging perfection or total agreement as to what is correct though. Some things may well get overlooked.

The Paragon chart is interesting, but neither vehicle specific nor very accurate. I found it to be of very little help. What I did was manage to keep detailed written records of every fastener as it was removed from my believed to be original, unrestored car. Many of the engine-related fasteners were used to verify and correct those on a friend's previously-molested real deal Yenko Super Camaro. It just so happened the engine went down the Tonawanda assembly line 4 days after mine.

 

Hi,
Working on determining original bolt head marking is a LONG and WINDY road.
The reason being that VERY OFTEN several suppliers furnished bolts for the same location at the SAME time. Bolts from 2 suppliers were likely to have been dumped in the same bin. There was no control of the head mark... the only thing that mattered was that a bolt, nut or washer, with the right specifications, was used in the right place.
For instance on my 71 the front bumper brackets bolts were a "M" mark on the left side and a "A" head mark on the right side.
The best you can hope for is a 'typical' head mark.
The NCRS TECHNICAL INFORMATION MANUAL AND JUDGING GUIDE does offer some information but not a lot.
The fasteners 'finish' opens up another world of opportunity for head scratching.
Regards,
Alan

 

The way to do it but "in the heat of the moment" , difficult to do - at least for me. When I took my front end off, bolts holding the radiator and supports were carefully put below thinking I'd label and catagorize them when the part was removed - but that didn't happen.

Thanks all for your comments