1966 gt350 header bolt question

[Karguy]

 Thank you very much Jeff and Bob! I think I will check with the owners of two of the cars that are very close to mine and I believe to be fairly original and see what they have on their's.  I recently found 273 here in Albuquerque of all places, It is been hidden away since the early 70s, the same owner. I can also check with the gentleman who owns 280.
Do either of you have or know of any spoke style bolts? There has been a set on eBay which I actually made an offer on a while back but they are quite  pricey and we could not quite come to an agreement.
Thanks for the guidance as always, Karl
281

[Bob Gaines]

Thank you very much Jeff and Bob! I think I will check with the owners of two of the cars that are very close to mine and I believe to be fairly original and see what they have on their's.  I recently found 273 here in Albuquerque of all places, It is been hidden away since the early 70s, the same owner. I can also check with the gentleman who owns 280.
Do either of you have or know of any spoke style bolts? There has been a set on eBay which I actually made an offer on a while back but they are quite  pricey and we could not quite come to an agreement.
Thanks for the guidance as always, Karl
281

I probably have a few but not a set. I would have to check

[Karguy]

Thanks Bob, that would be greatly appreciated please let me know perhaps I can purchase a complete set given a little time.

[gt350hr]

   6S477 has the same as 406 , "circle three bar".  Rockfords were later in production. It is important to remember the bolts were supplied with the headers by Cyclone. There wasn't a "specification or manufacturers" call out , it was whatever they sent. Usually whoever had the best price.
    Randy

[Karguy]

Good to know Randy, thanks for the info

[mygt350]

Appears dished design was applicable to 65's and design with 3 segments early -mid 65 and 66 with segmented design and Rockfords into 66?