thorley headers on a 67-72 sbc - The 1947 - Present Chevrolet & GMC Truck Message Board Network

72blue · 04-09-2009, 01:54 AM

Is anyone running these on angle plug heads? I am running a set of canfield's and when I bought the headers they said "fit most angle plug heads." That being said, I know I am not the only sap that chose angle plug heads of some sort and thorley headers...I hope. Anyway, the #5 plug is problematic; close to the header tube and I was thinking of the "shorty plugs" and not sure just exactly how much shorter they really are. Accel says (and I an awaiting them to answer my question as to how much shorter their plug that compares to the autolite 3924 canfield recommends really is) their shorty plugs are 3/16" to 3/8" shorter than the plugs that the shortys replace. So if anyone is in the same boat as I, what did you do? I am entertaining the idea of putting my ram horns back on if I cannot keep from frying a plug wire every few weeks or so.

Thanks to all
James

Jim_PA · 04-09-2009, 07:58 AM

You'll love those headers - No angle plugs here though.

72blue · 04-09-2009, 12:43 PM

How long have you had yours Jim PA? Are they coated? How well is the coating holding up?

Jim_PA · 04-09-2009, 12:48 PM

Quote:

Originally Posted by 72blue

How long have you had yours Jim PA? Are they coated? How well is the coating holding up?

I've had mine almost a year and a half. I got the cheap coating... I think it's chrome or nickel???

They are discoloring (turning blueish/black) but not rusting anywhere. Looks kinda cool I think.

big_al_71 · 04-09-2009, 12:51 PM

I have a small block with doug thorley headers and I had the same issue I bought the accel shortie plugs and problem solved...look at the pict below...

Jim_PA · 04-09-2009, 12:59 PM

Quote:

Originally Posted by big_al_71

I have a small block with doug thorley headers and I had the same issue I bought the accel shortie plugs and problem solved...look at the pict below...

Yeah, but it looks like those are straight plug heads. What problems did you have? I used regular plugs on mine but I also have non-angle plug heads.

big_al_71 · 04-09-2009, 01:18 PM

on the second picture the second plug with a reg size plg the wire was against the header and also plug #3 on the same side..I did forget to mention that I have straight angle edelbrock aluminum heads....Those two plugs were the only ones that I had the issues with.

check out this thread from when I had the problem...

http://www.67-72chevytrucks.com/vboa...d.php?t=306443

Jim_PA · 04-09-2009, 01:23 PM

I see -- must be the big MSD boots, b/c I have the edelbrock straight heads too, and didn't have clearance problems.

big_al_71 · 04-09-2009, 01:45 PM

Quote:

Originally Posted by Jim_PA

I see -- must be the big MSD boots, b/c I have the edelbrock straight heads too, and didn't have clearance problems.

what wires did you use?

Jim_PA · 04-09-2009, 01:50 PM

Taylor Spiro-pro's

04-09-2009, 01:54 AM	#1
72blue Registered User Join Date: Feb 2009 Location: arroyo grande, ca Posts: 206	thorley headers on a 67-72 sbc Is anyone running these on angle plug heads? I am running a set of canfield's and when I bought the headers they said "fit most angle plug heads." That being said, I know I am not the only sap that chose angle plug heads of some sort and thorley headers...I hope. Anyway, the #5 plug is problematic; close to the header tube and I was thinking of the "shorty plugs" and not sure just exactly how much shorter they really are. Accel says (and I an awaiting them to answer my question as to how much shorter their plug that compares to the autolite 3924 canfield recommends really is) their shorty plugs are 3/16" to 3/8" shorter than the plugs that the shortys replace. So if anyone is in the same boat as I, what did you do? I am entertaining the idea of putting my ram horns back on if I cannot keep from frying a plug wire every few weeks or so. Thanks to all James __________________ James

04-09-2009, 07:58 AM	#2
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: thorley headers on a 67-72 sbc You'll love those headers - No angle plugs here though.

04-09-2009, 01:18 PM	#7
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: thorley headers on a 67-72 sbc on the second picture the second plug with a reg size plg the wire was against the header and also plug #3 on the same side..I did forget to mention that I have straight angle edelbrock aluminum heads....Those two plugs were the only ones that I had the issues with. check out this thread from when I had the problem... http://www.67-72chevytrucks.com/vboa...d.php?t=306443 __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild

04-09-2009, 01:23 PM	#8
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: thorley headers on a 67-72 sbc I see -- must be the big MSD boots, b/c I have the edelbrock straight heads too, and didn't have clearance problems.

04-09-2009, 01:50 PM	#10
Jim_PA Registered User Join Date: May 2005 Location: PA Posts: 2,696	Re: thorley headers on a 67-72 sbc Taylor Spiro-pro's

04-09-2009, 12:43 PM	#3
72blue Registered User Join Date: Feb 2009 Location: arroyo grande, ca Posts: 206	Re: thorley headers on a 67-72 sbc How long have you had yours Jim PA? Are they coated? How well is the coating holding up? __________________ James

04-09-2009, 12:51 PM	#5
big_al_71 Registered User Join Date: Jun 2008 Location: South Florida Posts: 11,375	Re: thorley headers on a 67-72 sbc I have a small block with doug thorley headers and I had the same issue I bought the accel shortie plugs and problem solved...look at the pict below... Attached Images __________________ Get your facts first, and then you can distort them as much as you please!!!!!. Sylvester's build thread >>>http://67-72chevytrucks.com/vboard/s...ht=big+rebuild



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