74' Highboy questions
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Junior User
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74' Highboy questions
I took some measurements from my highboy and found the following
Radiator Support spacing: ~32"
Front of cab: ~45.75"
Rear of cab: ~35.75
Now my question is what the bolt spacing on a non-highboy? for example a 77 f100 for the same positions? Reason I am asking is because my cab will need to be replaced along with my box.
big_i80
Radiator Support spacing: ~32"
Front of cab: ~45.75"
Rear of cab: ~35.75
Now my question is what the bolt spacing on a non-highboy? for example a 77 f100 for the same positions? Reason I am asking is because my cab will need to be replaced along with my box.
big_i80
Lead Driver
Joined: Sep 2003
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From: Other side of the sunrise
I have re drilled the bed to mount the wider bed to the narrower "highboy" frame. Have never drilled the cab to match though. I would imagine that it too could be drilled if neccessary.
Laughing Gas
Joined: Jan 2003
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From: Georgetown, Ky
The rear cab mounts, are accessed thru plugs in the back of the cab, under the seat. So you'd have to go thru two layers and put in new plugs, but its possible to do. Anything is possible if you put your mind to it
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I've been reading through some posts and have gathered the following. The cab from the 77 f100 i have is the same as the 74 f250 4x4 except that the rear holes are farther apart than the f100. I've heard that you can drill the new holes in the cab to fit the frame, supposedly there are dimples where these holes go. Ford has the locations there just not drilled. So if I drill the new holes in the f100 cab so it fits on the highboy frame, will I have any problems as far as strength, or stability? Sorry but I am on the fence, I have a nearly perfectly clean cab and would really like to use it, but if it doesn't fit what is the use.
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From: Ohio
if your gonna tear off the cab why not move the rear cab mounts on the frame outward a few inches? cut them off and move em out... been there done that with mine. if you have a good cab that hasnt been patched or monkey'd with before, it may as well be a big ole chunk of gold! find a way too use it.
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The cab mounts on the frame are 35.5" apart, the cab mounts are 24". Moving the mounts on the frame does nothing to fix the problem.
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I made holes in the crossmember for my rear cab mounts and it mounted perfect. Correct height and everything. I just measured it out off the 2wd frame. It was alot easier than trying to drill the cab.
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From: lino lakes, mn
I've done this to 4 cabs it does not compromise the strenght of the cab or mounts heres what I've done take a bolt the same size as the body mount bolt about two inches long have it drilled down the center on a lathe 1/4 inch screw this into the existing rear cab mount on the frame this locates the bolt using a long 1\4 drill bit you can get at the hardware store drill the pilot hole in the cab use a hole saw the same size as the original in the cab use the hole you put in from the botton to locate the holesaw go through the first layer from the top then use a 7/16 to drill down to the body mount everthing will line up and use the little plastic plug from the old cab to plug the new hole I filled the other holes with sicon to keep the water out
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Thanks Plowpusher
I think that is what I am going to do, I have a lathe at work I can spin one out real quick. I like that method. I asked around and apparently Ford made only 1 cab, but drilled the rear mount holes in the location that fit the frame, eg. highboy, non highboy. Thanks for the method.
I think that is what I am going to do, I have a lathe at work I can spin one out real quick. I like that method. I asked around and apparently Ford made only 1 cab, but drilled the rear mount holes in the location that fit the frame, eg. highboy, non highboy. Thanks for the method.
