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Old 08-13-2008, 11:24 AM
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Default 73'-79' Ford Truck Question

Aside from the grille changes in 78'-79', did all the 73'-79' have the same body panels from the front clip back to the box???

A friend of mine thinks that 78'-79' had a different groove running down the side of the body, but I don't think so, especially since LMC lists all the aftermarket body panels as 73'-79'.

I need to know this because I found a 79' box, and I need to make sure it will fit/match the front of my 77' F-250.
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Old 08-13-2008, 12:56 PM
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i had a few of these years back. they are all the same 73-79 is just that. same fenders, doors, cab, bed and so on
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Old 08-13-2008, 01:11 PM
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There are two different bolt patterns for the boxes on the 73-9 trucks. I cannot tell you where the splits are, but a buddy found this out the hard way. I never realized it untill we tried to put the box on and the holes didn't line up. 8)
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Old 08-13-2008, 01:35 PM
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Quote:
Originally Posted by Gearhead559
i had a few of these years back. they are all the same 73-79 is just that. same fenders, doors, cab, bed and so on
That's what I thought, just wanted to be sure before buying a truck. Looks like the 79' is almost rust free...prolly a perfect parts truck fort my 77' Highboy.

My 77' came with a good frame/tires/wheels/suspension/axles, great front fenders, and a good cab, but everything else was junk.

The doors are very rusty on the bottom, cracked windshield, bad glass, the hood had holes in it from a fiberglass hood scoop that was riveted to it, and the box was made of rust and bondo. :lol:

Got a good deal on it, though.

It's gonna be a good truck when it's done...8 inches of lift, 35" Monster Mudder tires, 521 stroker, etc...Here's a video of the truck when I first brought it home:

http://www.youtube.com/watch?v=4UkHBcjgaKI
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Old 08-13-2008, 02:18 PM
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Old 08-13-2008, 02:44 PM
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i had a 77 step side 2x4 had a 302 in it, but i think mine had the 75 grill in it. my grill inserts wrapped around the headlamps. which when i looked it up, it was a 75 only type thing , but hell i have been wrong before. now i ran into the mount issue to, but the good thing was i knocked the mounts off the old frame from my parts truck. sounds like we did the same thing :lol:

i had the 302 frame stands in mine but a 460 fit right in there with 68 390 passenger car mounts flipped left on the right side and the right side mount on the left then open the holes up to fit the block and it fit right down in there :wink:
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Old 08-13-2008, 03:41 PM
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I just pulled the 351m out of the truck a few weeks ago. Didn't have much HP, but it felt pretty strong for torque. I think the 521 will really wake the truck up...it's being built for around 550 HP and 650 ft.lbs. of torque. That power will be going through a rebuilt C6, a NP205 transfer case, and into the 4.10 Dana 44 front axle, and the 4.11 Dana 60 rear axle with a Detroit Locker. The motor will probably smoke those little 35s, which will be a good excuse to upgrade to 38s someday.
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Old 08-13-2008, 05:22 PM
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Default Ford Truck Boxes

The 77 & older F-250 4wd high boys had I think a 1.5" narrower frame from behind the cab to the rear bumper. The 78-79 F-250 had the wider frame like 74-79 F-150's, 2wd and 4wd. Also of note is that the commerical cab and chassis f-350 duallys all had the narrow frame and spring up into the mid eighties and utilized the narrow spring perch Dana 70's. The desireable Dana 70 is the 78-79 f-350 super cab 2wd wide spring perch.

FWIW Mark L.

PS: Many people just drill the holes out where you need them, add a piece of the right size tubing and weld up the other holes and away you go.
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Old 08-13-2008, 10:56 PM
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I went and looked at the 79' F-250 for a parts truck tonight, and it just might work. Even though it has a little bit of rust, and a few holes in it, it is overall a solid truck with many useable parts. And I really like that it is 100% original and has never been restored, so there is nothing welded onto it that isn't supposed to be there, and there is absolutely NO bondo on it.
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Old 08-14-2008, 08:03 AM
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73-79 Ford Fseries had a 36" wide frame on all except

73-77 4x4 F250s it has a 34" wide frame

if your truck has a divorced transfer case (driveline in between transmission and transfercase) then it has the 34" wide frame
the only boxes that is a bolt on deal is 73-77 for you

if you insist on using a a later box you need to do some work to the floor
first you need to drill the holes in the correct location and then you need to install spacers (short pipes will work) inside the braces where the bolts go to prevent the bolts from crushing the crossbraces

on the engine mount thing
I build frame perches that bolt onto the frame using original holes
that uses the factory 1983-1997 460 insulators to mount the engine in the 73-79 Fseries


perches will vary depending on application
Link to the mounts http://www.ncspecialties.com/autobod...ches/index.htm

currently I have them for

77.5-79 F250/F350 4x4s
77-79 F100/F150 4x4s
and 73-76 F100/F150 4x4s

I am looking for someone with a 73-77 F250 4x4 that is willing to be a test subject

I normally get 225 plus ride for these perches but for the person that is willing to work with me on fitting and letting me know of any mods if any is needed to work on that frame

I will sell a set for 150 plus ride I am thinking but not 100% that my 73-76 perches is a bolt on deal for the 73-77 F250 4x4 that is why I am willing to do this thus the first person willing to try it gets a 75 dollar break
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Old 08-14-2008, 09:39 PM
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What kind of carb should I go with for my 521 I'm having built???

Here's a little info on the engine:

-built for 91-octane pump gas

-around 10:1 compression ratio

-1974 D1VE block

-1970 D0VE-C iron Lincoln heads (ported/polished)

-stainless Cobra-Jet-style valves

-roller rockers

-Weiand Stealth intake, gasket matched to the heads

-haven't decided on a camshaft yet, but it will be a little more aggressive than stock (rougher idle, while keeping a wide range of HP and torque)

-gear-drive (noisy) timing set

-forged internals (pistons, rods, etc..)

-crankshaft externally balanced to 6,000 RPM

-Exhaust will be headers to 2.5" true duals, going into Cherry Bombs

-This truck will mostly be for show, and will not see any mudbogs, but needs a good balance of HP and torque for occasional light offroading.


Any suggestions for a carb that will work well with this setup??? Also, some suggestions for a camshaft would be nice, too.
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Old 08-14-2008, 09:44 PM
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That noisey gear is gonna drive you nut's. My friend put one on his 500 CI Ford and man was it annoying.
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Old 08-15-2008, 12:57 AM
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X2 ditch the gear drive and just do the early double roller timing chain.
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Old 08-15-2008, 02:40 AM
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yeah, I just watched some videos of them on Youtube...they do sound pretty annoying
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Old 08-15-2008, 02:43 AM
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I'm kinda thinking that a 750 carb would be a little too small, since people put them on stock 460s...Would a 1000 cfm carb work OK for my 521???
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