confused with lug stud sizes. help

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BYM

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well got a 1969 dodge dart swinger 340.
has the 9 inch drums front and rear.
I want to change the all of the lug studs and lug nuts.
seems that there are a bunch of different sizes, im looking into having longer studs on the rear just in case. any recommendations?

its a 8 3/4 rear and its a one legged runner
 
I always run open ended lug nuts on everything.

As far as length I think mine are 2". Not sure on that one. I'd give a call to strange and see what length they recommend
 
Something doesn't seem right. An 8-3/4 rear axle with only 9" drum brakes? Should be 10 x 1-3/4 if stock.
Are you sure it's not a 7-1/4 rear?

Anyway, I'd check Rock Auto first and see what's listed.
Then looking at the specs for the correct stud, see if there is a longer one available from Dorman with the same spline diameter and thread. Should be 7/16-20 for either rear axle.

You realize that it probably has left hand threads on the driver side? Good idea to switch to right hand threads all around since you want to replace them anyway.
 
yeah probably, havent measured them just eye balled them.. hahaha but I did make sure it was the 8 3/4
 
The Dorman web site has a database of lug sizes you can download for Excel. But it is enormous, so it is hard to find any specific application.

Why are you replacing the studs, may I ask? I can understand getting rid of the LH ones, or if you need longer ones for racing, but otherwise...
 
Unless the backing plates have been drilled to fit the 8 3/4”, the 9” brakes will not fit an 8 3/4” rear. Even then, who would go through the trouble of doing that to get smaller brakes? And a 340 car would not have 9” brakes from the factory...ever. Better check those diameters.
 
I believe they are 7/16-20 x whatever length you need
 
So depending on the rear/axle the stud is either 7/16"-20 or 1/2"-20
 
the 8.75 in my 340 4sp Swinger has 7/16 studs.
I ordered some Dorman 1/2" I think will fit if I enlarge hole a bit.
 
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