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Jul 1, 2004 | 09:35 AM

jjudd84

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From: Salem, OR

Header question

I have a question about a header. I found a dual output Doug Thorley header that I can get for my pickup that says that it fits a 1965-1976 2 wheel drive Ford F-100 with a inline 6 300. I have a 1978 Ford F-100 with a inline 6 300 and its 2 wheel drive, what is the difference? Would it be a really bad idea to buy it and hope that it works?
Thanks..jjudd84

Jul 1, 2004 | 07:33 PM

benwantland

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From: Iowa

I can't imagine any reason why it might not work. Nothing major changed on a 4x2 F100 in those years...

Jul 24, 2004 | 02:10 AM

IanuReeves

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From: East Texas

The only real difference concerning headers for the 300 is after 83 with the added emission controls.

Jul 25, 2004 | 12:02 AM

fordflaresides

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From: Tucson, AZ

The only thing I could possibly think of is maybe they switched to a bigger stock starter motor after '76.

Jul 25, 2004 | 10:33 AM

benwantland

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From: Iowa

I don't think so.... I believe the starter was pretty much the same for the first 20 or so years, and then it maybe got replaced by a smaller one.

Jul 26, 2004 | 01:15 AM

fordflaresides

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From: Tucson, AZ

After '76 is probably when they started using egr valves that have the pipe that screws into the exhaust manifold.

Jul 26, 2004 | 12:23 PM

jjudd84

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From: Salem, OR

That makes sense..

I put the header on and it seems to work fine, it fits pretty tight but I think that is normal , I had to grind out part of the egr valve pipe in order to get the thing to fit but it bolted right up and looks sweet. Thanks for all of you input, I appreciate you taking the time to help..
jjudd84

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Jul 26, 2004 | 11:45 PM

fordflaresides

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From: Tucson, AZ

Blah, I meant to type: I've been <b>looking</b> for manufactuer of single outlet header.

Jul 27, 2004 | 01:03 PM

#10

jjudd84

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From: Salem, OR

Dual output

The header that I put on is a Doug Thorley dual output, I was hoping to do a single output when I started but I am pleased with the way that this one turned out. I know taht Pacesetter performance makes a single output header for the inline 6 300, you can find them in JC Whitney but they run around $230. I bought mine off of e-bay for $75.00..