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Why 77-79 Ford on SFA conversion

L

linksvu

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Littleton, Colorado
Could someone tell me why it is suggested to use a 77-79 only front axle on a SFA conversion. I will be starting my conversion later this summer on my 1994 k2500 Suburban and I understand why the GM axle are not used, but I do not know why I cannot find a newer Ford or even a newer Dodge axle...they seem as if they would work.

I plan on using the ORU kit as it seems pretty straight-forward...

I am sure I am missing something here, but what?:dunno:
 
I'm not sure why the newer ford axles aren't used, but the dodge axles that were leaf spring all had pass. side diffs, just like the GM's. When dodge switxhed to drivers side diffs in '94 they went to a 4 link setup. So there would be more prep work involved to mount up that axle. Hope this helps a bit!
 
77-79 ford have 32 or 32.5" spring spacing the newer ones had 36" they will work but you have to order the correct kit.
 
Last year for kingpins are 92 IIRC on Fords and maybe Dodges. You can find 60 and 70s in conversion trucks, but they are hard to find and expensive. If you need an axle, PM me, I know where there are some HP44s, but no 60 yet, so don't ask!!!! :)
 
I plan on running only 35's with a detriot (or lock-right) up front, so I really do not see having to HAVE a d60 up front, I think a d44 would be fine....but a d60 would always be nice. Just a good compliment to the 14ff in the rear.
 
That's what I'm gonna do. Buddy is giving my an HP44 heavy duty out of a 77.5 3/4 ton. My truck is a driver, so I don't need the 60 either, and want to run 35s on mine too. Where is Littleton?? I used to live in Broomfield, and went to a bunch of yards out there, course none had any 60s. There they are like gold. HP44s should be in the yards....
 
b454rat said:
That's what I'm gonna do. Buddy is giving my an HP44 heavy duty out of a 77.5 3/4 ton. My truck is a driver, so I don't need the 60 either, and want to run 35s on mine too. Where is Littleton?? I used to live in Broomfield, and went to a bunch of yards out there, course none had any 60s. There they are like gold. HP44s should be in the yards....
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Broomfield is up north, north and east of Denver. I am south west of denver, more Suburb.....I did not think about the yards....good thinking!:D
 
I'd go with the newer one. Everyone has the older style, but not too many newer SAS ones out there. If the trans was rebuilt, right there is $1500 at least. The older one might be carbed, will have a 10 bolt front, junk rear, inless it's the rare one with the FF in it. Plus the newer one is injected....
 
Well my plan was for a 87-91 (more than likely the 89-91) for the FI and it would, without a doubt, be a k2500, but not sure about the ff or sf rear....

I thought the k2500's were d44 up front?
 
Nope, they used a 10 bolt. At least they used 30 splines over 27. I would still get the newer one, it has a TBI 454, 4l80, 241, and a 14ff rear, none of which you will need to upgrade. If you get an 87-91, you can't get the 454 in a 4wd, 4l80 was 91 only, t-case is about the same, and will have 10 bolt front and rear, if not then a 14sf, just about all of which would need to be upgraded. With 35s you might be OK, but you know you won't be braking stuff with the newer truck. And right now you want to run 35s, but we all know that won't last long. I think I just wanted to run a set of 35 boggers that I had on my old truck, to run on my 89 when I first got it. Now Im going to 40" boggers. (This weekend, woo hoo!!!!)
 
b454rat said:
Nope, they used a 10 bolt. At least they used 30 splines over 27. I would still get the newer one, it has a TBI 454, 4l80, 241, and a 14ff rear, none of which you will need to upgrade. If you get an 87-91, you can't get the 454 in a 4wd, 4l80 was 91 only, t-case is about the same, and will have 10 bolt front and rear, if not then a 14sf, just about all of which would need to be upgraded. With 35s you might be OK, but you know you won't be braking stuff with the newer truck. And right now you want to run 35s, but we all know that won't last long. I think I just wanted to run a set of 35 boggers that I had on my old truck, to run on my 89 when I first got it. Now Im going to 40" boggers. (This weekend, woo hoo!!!!)
Click to expand...

Lucky man!!
 
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