1965/1966 big block spark plug heat shields

[Bill W.]

Re: 1965/1966 big block spark plug heat shields

Joe I guess you are talking about the back side of the slotted section? at a glance it looks square ,but the squared off corner has a slight radius. The silver very well could have been zinc .

[Bill W.]

Re: 1965/1966 big block spark plug heat shields

Joe I guess you are talking about the back side of the slotted section? at a glance it looks square ,but the squared off corner has a slight radius. The silver very well could have been zinc .

[Michael H.]

Scan of 1966 big block spark plug heat shields *NM*

[Michael H.]

Scan of 1966 big block spark plug heat shields *NM*

[Joe L.]

Re: Scan of 1966 big block spark plug heat shields

Michael------

This is the configuration with the "squared-off" end. I was referring to the end of the "cut-out" which is adjacent to the bracket. On the 3868828 this surface is supposed to have a modest radius to it. On the 3871266 it's supposed to be "squared off" (like this one). Both shields have the radiused corners at the rear of the "cut-out".

How long is this shield overall? If it's 2-1/2", then it's configured just like a 3871266 except for length. If it's 3", then it's configured exactly the way a 3871266 is supposed to be.

[Joe L.]

Re: Scan of 1966 big block spark plug heat shields

Michael------

This is the configuration with the "squared-off" end. I was referring to the end of the "cut-out" which is adjacent to the bracket. On the 3868828 this surface is supposed to have a modest radius to it. On the 3871266 it's supposed to be "squared off" (like this one). Both shields have the radiused corners at the rear of the "cut-out".

How long is this shield overall? If it's 2-1/2", then it's configured just like a 3871266 except for length. If it's 3", then it's configured exactly the way a 3871266 is supposed to be.

[Louis F.]

Re: 1965/1966 big block spark plug heat shields

Mike, Joe, and Bill. How are the seams configured on your shields? By the way guys thanks for your knowledge and your response. Lou

[Louis F.]

Re: 1965/1966 big block spark plug heat shields

Mike, Joe, and Bill. How are the seams configured on your shields? By the way guys thanks for your knowledge and your response. Lou

[Michael H.]

Re: Scan of 1966 big block spark plug heat shields

Ok, thanks Joe, I was confused. So, this then would be the correct design for most 65-66 applications? I assumed it would be the 2nd design because it was from a 66.

It's OL is just about exactly 3".

Do you have the print for these?

[Michael H.]

Re: Scan of 1966 big block spark plug heat shields

Ok, thanks Joe, I was confused. So, this then would be the correct design for most 65-66 applications? I assumed it would be the 2nd design because it was from a 66.

It's OL is just about exactly 3".

Do you have the print for these?

[Michael H.]

Scan of 1966 shields front

Sorry about the quality. I'll get a better pic later.

[Michael H.]

Scan of 1966 shields front

Sorry about the quality. I'll get a better pic later.

[Joe L.]

Re: Scan of 1966 big block spark plug heat shields

Michael----

Then what you have is the GM 3871266 exactly as it's supposed to look. This would be the "2nd design" assuming that the "1st design" was the GM #3868828 and that that piece was ever actually manufactured and used.

I do have the print, but I don't know how to post it. No matter, though, as I've just discovered the print for BOTH shields also happens to be in Noland Adams' book on page 285.

[Joe L.]

Re: Scan of 1966 big block spark plug heat shields

Michael----

Then what you have is the GM 3871266 exactly as it's supposed to look. This would be the "2nd design" assuming that the "1st design" was the GM #3868828 and that that piece was ever actually manufactured and used.

I do have the print, but I don't know how to post it. No matter, though, as I've just discovered the print for BOTH shields also happens to be in Noland Adams' book on page 285.

[Michael H.]

Re: 1965/1966 big block spark plug heat shields

Ok, my 3871266 has the hole but has the radius corner. That doesn't agree with the print.