1977 351m highboy headers?
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Joined: Nov 2003
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Hedman Headers, 351M 400 they have these ones that are fenderwell exit that will clear any axle. IF you're into fender exit headers. good luck. I'm out of ideas after this
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Joined: Jun 2005
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Highboys are differant in a number of ways. The differance that is making it hard for us to find headers is that the frame cross members are in a differant location. Power steering, transmission, transfercase, axles, brakes, are all differant. Then you have the early 77's that had changes making it even harder to find parts. Basicaly Highboy's are completely differant truck. Unless you have had one you wouldn't have ever known how much they differ. Some people who have had them and still didn't know.
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From: Jersey Shore
I have a set on my 77 4x4 f250 crew cab w/ the 351M 4spd and a d60/LP and they fit, installed by prior owner, there is a tag on them , I will try to get some pics and seee what the tag reads ...who makes them and get back to you guys...as far as frame widths, fronts are the same width... the rear section is about 3" narrower, thus causing the problem w/ the fit of the aft gas tanks, also use 2-1/4" wide rear springs instead of the 3" wide.
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Joined: Jan 2006
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From: Waterloo IL
Highboys are differant in a number of ways. The differance that is making it hard for us to find headers is that the frame cross members are in a differant location. Power steering, transmission, transfercase, axles, brakes, are all differant. Then you have the early 77's that had changes making it even harder to find parts. Basicaly Highboy's are completely differant truck. Unless you have had one you wouldn't have ever known how much they differ. Some people who have had them and still didn't know.
I had a 1975 full time highboy with a 360 what I sold to my uncle. I am planning on buying it back to use as a beater truck once my half ton is back from paint.
Somewhat off subject but which highboys had a Dana 60 in front?
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Joined: Jun 2019
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Did you end up selling?
I posted on the old thread that fordmuddin brought back..... I've got a perfectly original (except for headers) 77 highboy that I bought recently. The previous owner had just put them on, I want this truck all stock. I will trade these headers even up for the correct manifolds.
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Joined: Jun 2019
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I have a set on my 77 4x4 f250 crew cab w/ the 351M 4spd and a d60/LP and they fit, installed by prior owner, there is a tag on them , I will try to get some pics and seee what the tag reads ...who makes them and get back to you guys...as far as frame widths, fronts are the same width... the rear section is about 3" narrower, thus causing the problem w/ the fit of the aft gas tanks, also use 2-1/4" wide rear springs instead of the 3" wide.
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