Running board mount help needed

[48 pickup]

Hi chaps
New here so be gentle ,I am building a frame for a 48 chevy truck and I am in need of a bit of help please . I could do with a few measurements of the running board mounts can you help
Thanks

[48 pickup]

And these measurements please
I've been on all of the forums over here but to no avail
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[chevy49]

center of rear wheel to 1st beacket is 25 inches 2nd bracket is 52 inches 3rd bracket is 82 1/2 inches all the beackets are different

[48 pickup]

Thanks ever so much for the info,I've been hunting and searching for weeks

Would you mind taking a look at the measurements of the brackets
This is the final peace of the puzzle
Again thanks
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[48 pickup]

Hi guys here are a couple of pictures of my frame
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[48 pickup]

One more ,sorry I can't seem to load more then one picture at a time
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[mknittle]

Originally Posted by 48 pickup

Thanks ever so much for the info,I've been hunting and searching for weeks

Would you mind taking a look at the measurements of the brackets
This is the final peace of the puzzle
Again thanks
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From the tip to the radius is 6.5 inches on top, where the board mounts.
I think for the width you will need to have somebody measure the overall width. tip to tip then do some math. I cant help on that now mine is apart and the the hangers need to be straightened.

[48 pickup]

Great response here guys, really appreciate your help on this ,keep it coming
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[BlueJeep]

You'll probably just want to wait until you have your cab and bed on and mock up the boards and then measure the mounts. The reason I say that is AD frames are shaped like an "A" (narrower in front than back) and your frame looks to be straight, so unless you're lucky and good at geometry stock measurements of the running board brackets won't do you a lot of good.

Frame looks good by the way!

[48 pickup]

I copied my frame from a GM PLAN (see pic) hope it's the right one
It shows that the frame is straight ?
Still because mine is custom I can't see any issues
I guess if I had the tip to tip measurement like mknittle (thanks fella) said that's me sorted
Just work from the center line
Can anyone help (again,it's all about me ,I now sorry )
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[BlueJeep]

I don't think that's for an AD truck... It should be "A" framed if it's a 1/2 ton and I see 4 body mounts there, and AD's had shackle mounts on the rear of the cab. Somebody here probably has a similar diagram for an AD.

My guess is that diagram is for a task force truck.

[48 pickup]

Ggggggrrrrrrrrrrrrrrrrrr
It seems he is right it's a 56 frame blueprint ,so has anybody got a blueprint for a 48 Please
I'm pulling my hair out here thinking I might need to start over

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[BlueJeep]

Originally Posted by 48 pickup

I'm pulling my hair out here thinking I might need to start over

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I don't think I'd start over if I were you. There isn't anything wrong with having parallel frame rails, and you aren't any worse off than those of us who've done frame swaps for another vehicle. Obviously you aren't going for original so mount the cab, then mount the bed, and then hold the running boards up with adjustable jacks and then just fabricate the mounts out of 1x2 rectangle tube. Both the AD and the TF frames are relatively flat, and you've already got that covered.

[48 pickup]

Thanks for your thoughts ,you may have saved my hair (it does need cutting though)
I truth is my truck is on the high seas as we speak (due next month)and I was trying to get a head start on it
So to heed you advice I need to hold up right now before it all goes ***s up
Still the more measurements the better I can cross reference to what I have
Again thanks for the advice
Cheers
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[mr48chev]

As you have already figured out that isn't going to work right under an AD GM truck but I think you should be able to save it. My question is why build your own frame when the truck should have a stock frame you can install your front end on and modify the rear like you did on that frame?

You should be able to cut the welds from the front crossmember loose and go back at least to where you welded the two tubes together and make a pie cut in the top rails and bring them in so that they are the correct width for an AD frame.

The 3/4 ton frames taper back under the cab and then run straight back from there unlike the 1/2 ton frames that taper front to rear.

This is a link to the 47/54 Chevrolet truck assembly manual that many of use to figure out measurements and how things fit together. There are a number of sources for it including some on a CD/DVD that would save shipping and time for you. It has every size of AD truck in it so you have to sort though it but it will save many hours of trying to figure things out.
Amazon.com: 1947-54 Chevrolet Truck Assembly...
I'd also suggest getting a factory service manual for your model of truck. Even if you change a lot of things there is a lot of information such as adjusting doors and adjusting the hood and fenders that really help.

[48 pickup]

Cheers for the advice
Could you just tell me from your copy the frame width at its maximum just to put my mind at rest,I will get a copy on order
Just another point if I leave it as it is what will it foul if anything
I am also fitting a ls1 so this might help my case?
Thanks
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[63 & 64 Bowties]

Originally Posted by BlueJeep

mount the cab, then mount the bed, and then hold the running boards up with adjustable jacks and then just fabricate the mounts out of 1x2 rectangle tube.

I could be wrong, but I can't remember anyone who's done a frame swap (which is basically what you've done) that's used stock running board brackets. They just never work out. Like BlueJeep said, mount the cab, set the bed on and figure where your running boards need to be, then fab brackets. Be sure to mock up your running boards before you permanently mount your bed so you have wiggle room.

[48 pickup]

Cheers for the advice ,what you say is fair
Seems as that's the way to go ,I was just a bit inpatient just had confirmation that the boat will dock over here on the 13th of December ,can't wait, been a long time coming
Will keep you up dated
Cheers for all your advice
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[lmdangerous]

Very nice Frame . I built running boards for a 55 (5100 LCF) - about 10 years ago , I mounted the box, Then set the running boards and fenders so they looked right. Remember that a LCF is big so I could just get on my knees and look at it .I used floor jacks , and never used a tape measure until I got ready to make the running board mounts- which I made out of 2 X 2 heavy wall tubing. It looked like some one ran a 55 2nd series into a wall at about 100MPH. It was my tow truck for 10 years - its in Selmer Tn right now and I wish I had it back - oh well he does drive it a lot at least its getting used.

[mknittle]

Check this thread. mr48 was kind enough to post a link and some pics that may help.

[solidaxel]

Remember the running boards are attached to the rear fender only, so the mounting of the bed and rear tire is critical.
I would wait until you have it in front of you or a light tack weld, or a slotted bracket on the frame!
I do like the idea of Jag front and rear ON A STOCK CHASSIS!!

[mr48chev]

Here is a shot of my long wheelbase 1/2 ton frame. it's 9-1/4 inches longer than a short wheelbase frame but it is still the same width at the front and rear as the short bed frame.


I thought I had a shot of it.
<a href="http://s173.beta.photobucket.com/user/mr48chev/library/1948%20Chev%20pickup" target="_blank"><img src="http://i173.photobucket.com/albums/w71/mr48chev/1948%20Chev%20pickup/th_002.jpg" border="0" alt="AD truck frame width at front axle"></a>

That is right where the axle goes under the frame and it measures 28 inches at that spot.
This is a one ton frame I posted for someone else a couple of days ago but the side to side measurements are the same back to where the rails straighten out and run parallel.

It's too long out in front of the front crossmember for a 1/2 ton though so that measurement from the axle to the front of the frame is wrong as a 1/2 ton won't have the extra extension legs you see drawn on the front of the frame rails in the drawing.

This is full length drawing of the 1 ton frame. The only thing you are interested in is where the taper of the frame stops and straightens out. I'd say around where the rear trans mount goes should work fine.


I'll try to remember to copy the 3100 frame drawing out of the book tonight and post it on the thread but I won't get home until 19:00 pacific time.

[48 pickup]

The picture of a 3100 would be really cool thanks
Thanks for your help and time mr48chev
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[48 pickup]

Could you email me the 1/2 ton picture and the 3100 picture please
Would really appreciate it ,will PM you my address
Cheers
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[mr48chev]

Check your email.