Headers on a 400
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Junior User
Joined: Jan 2008
Posts: 59
Likes: 1
Headers on a 400
Hi there,
I have a 78 f250 400 c6 4x4 with side heater box on passenger side. I got a set of in chassis long headers, not sure of the brand, there for a 400 the guy said and i was wondering how hard is it to do, and steps to do it. I plan on doing a dual 2.5 inch exhaust with hopefully a crossover.
Thanks
Alex
I have a 78 f250 400 c6 4x4 with side heater box on passenger side. I got a set of in chassis long headers, not sure of the brand, there for a 400 the guy said and i was wondering how hard is it to do, and steps to do it. I plan on doing a dual 2.5 inch exhaust with hopefully a crossover.
Thanks
Alex
Lead Driver
Joined: Apr 2008
Posts: 6,944
Likes: 13
not hard at all... soak your manifold with WD-40 for a day or so... then pull em off and the rest of youre exaust.... then bolt your headers on. Drive it around for a few days with open headers to show it off... hehe, then drive er down the the muffler shop.
MSEE
Joined: Apr 2004
Posts: 10,386
Likes: 35
From: Austin, TX
I agree with Ben - use a real penetrating oil. WD-40 does nothing in these aspects; I feel that PB Blaster is a really good choice. Take your time working the bolts out too. Don't work them out all in one effort with a socket as this puts stress on the bolt. Turn it a little at a time. Tight rusty bolts generate heat as you work them loose and tend to flex some.
When I put headers on my 79 last spring, I drove it across town to the exhaust shop with open headers. I had to keep it around 25 mph because anything above that resonated in the cab and hurt my ears really bad.
When I put headers on my 79 last spring, I drove it across town to the exhaust shop with open headers. I had to keep it around 25 mph because anything above that resonated in the cab and hurt my ears really bad.
Mountain Pass
Joined: Aug 2004
Posts: 186
Likes: 5
From: Blenheim Ontario Canada
I put a set of Heddman long tube in frame headers (Part # 87260 i think) on my '77 with a 351M. I had two issues. On the left side the shift linkage stud interfered with collector. The fix for this was to warm up the collector then using a piece of 1" copper rod, formed a concave in the collector just large enough for the stud to clear.
Second, the tranny cooling lines had to re routed to run under the tranny pan. My buddy makes hydraulic lines for assembly equipment so for a few cold ones he made me a couple of lines using stainless steel.
Second, the tranny cooling lines had to re routed to run under the tranny pan. My buddy makes hydraulic lines for assembly equipment so for a few cold ones he made me a couple of lines using stainless steel.
