Ok on the measuring we'll have to say there is a couple ways to do it and both are correct.What i curently have with the 57 ford axle(well actaully drivers side right now and the other to be changed)  in my 57 ford housing is axle to axle flange width of 61.75 then the thickness of the flange would have to be added as well. prolly 3/16" x2 for a total of  62.125 " if i did my math right you may be right it could be easier to measure axle flange to axle flange .I will do it the next time am down to the rotor is the rear...lol...

I knew that the the axle housing on a 70 mach one was 59.25 and i was loosing 2" with my 57 housing so i went with 1" wheel adapters to gain that back and get be back stock stance.I figured although some do not like adapters it was still my easiest cost effective out.
Once i get to run the car some and experiment I might see what it looks like  wheels/ tires  fit like without the adapters or maybe scale back to 1/2" spacers but we'll see and for now the goal is to get the vibe out and switch the pass side axle out with a mate to the d-side which is from a 57-59 ford.
Currently i have the pass side axle sticking out of the axle falnge about 1/8 farther than the d-side due to the difference in bearing offset between the two mis matched axles.I should have the other axle in next week once i get axle painted and bearing changed out but figured one drive to town won't hurt anything.Car show this sunday.

r5cya
the measurments in this chart are from housing flange to housing flange .I never though you were being rude at all.We just have a couple different ways of doing it.I just wanted to get back to stock measurments so i could use stock 500's with correct backspacing for a period correct look.
http://www.carnut.com/specs/rear.html

I came back as an fyi and to share some more info from my findings.I am pretty confident my housing is from a 57 ford and because it measures 57-1/4" form rear of axle flange to rear of axle flange and it has the band in the center and ultrastang feels they are out oof said car as well.I had a axle here from a 57-59 ford and I measured everything up and it slid in and the bearing bottomed out in the housing perfectly So i am confident in what my housing is.My 3rd member is traction lock with 28 spline and 325 gears and i have another Nodular 3rd member here with 486 gears in it .
This is the setup in my brandywine 70 mach 1.Thanks

I think the axle i had in my car is possibly a 31 spline from a newer car than mine that has been cut/turned down and then re-splined.I say this because of the machining marks on the end of the axle and the axle is not tapered like other 28 spline i have seen and the larger register for the brakes that steve has mentioned.

Why is the centering ring needed since the shoulder on the wheel studs seem to hold the rotor from moving side to side and once the rotor and then wheel adapter are installed i can not see how anything could move.I know that the lady who seemed very knowleagable about the spacers and hubcentric and lug centric isues said the spacer did not rely on the center register for strength or support.Not trying to contradict, just trying to lear and sort things out.

Would you have any idea where to even start to look for an axle or specs for the 74 model ford and up ?THANK you Very Much

I have another thread going and hope nobody minds but i wanted to try to get help identifying this axle.
I will state what I thnk I have for house etc.
From what I read and see it is 57 ford big car 9" housing which is 57-1/4" measured from inside of the housing flange to inside of opposite flange .It takes the small bearing which are these dimensions. IDODWidthSmall Brg1.378"2.835"0.8449"It also has the 3/8' holes in the flangette and the end of the housing to hold the axle in place.
It has the 2" band down the back of the housing, no dimples and the drain is in the bottom.I never measured the spring purchases lately to see how far they are apart.
Someone else installed this diff and axle and I cannot reach them.
My issue is i have seen several 57 ford axles yesterday and have one of the axles here to know my axle is not the same and i would like to get a mate to the black one in the pics.The black one has a larger higher center prodrusion in the center.The flange that holds the studs is larger dia.Mine has more holes in the flange for some reason and the bearing offset from the front of the flange that the wheel sets on to the outer side of the bearing is about 1/4" closer to the pline end of the axle than the rusty one from the 57 ford big car.I am really puzzled.

jkordzi,
I believe the axle was twisted and bent when i bought the car 2 years ago and am now figuring it out since i have been restoring the car and deperately try to get som milles on it but the gremlins are winning.

I need a drivers side axle for my non stock rear end It is 5 on 4.5 and 28 spline.
Can i buy something esle to fit it and what measurments will i need to know as far as brake offset and length.I belive my brake setup is of a lincoln MK7 but all my notes are at work today.
Yeay its a messed up setup but i am just trying to make it work.
Thanks
Terry

 

It's been determined i have the rear end from a 57 for big car which is 2" narrower than a standard 70 rear end.i was wondering if someone could help with what i would need for an offset in the wheelsl and what sirze tire would filt the wheel well and front fendors properly.
I am liking magnum 500's and BFG's and not too wide , something a tad agressive but as good as aride as i could expect.
Thinking something like 245/60/15's rear and 235/6015's front or all the way around.Any help would be appreciated.

42-1/2or 42-5/8" from center of spring purchases or spring alignment bolt it is hard to get it exactly due to the hump where the gears are, being higher than the axle housing but that is pretty darn close and it was in the car and i measured the center to center distance of the rear rails and it's the same as the above measurement.Here is an overall pic steve.
What is the distance from wheel mating surface to wheel mating surface on the rear that would have came in the car and just as important what would have been the distance from the wheel mounting surface in to the center of the spring purchase.
My hope is once i figure out what i have for room i can look at what i should be looking for in the way of tires and wheels.
Thanks

I like it.I tried to post pics of my car but cannot until i gte my post count up if i understand it correctly