[FWDLK] Driveshaft questions

[Dirt Rider <drt-rdr@xxxxxxxxxxxxxxxx>]

I've had some vibration from my 56 Savoy 6cyl. I have the driveshaft out and
there seems to be play in the joint. I know it must be in the housing
because I've had the joints changed before..
It's late and I'm confused. I ordered a NOS housing from a parts supplier.
It was listed at the housing for a 6cyl, I don't remember if I gave him the
part number for a 55 6cyl, I thought it was the same part as a 56 (I don't
remember the number)
Anyway, I got the joint housing and it's different than mine. It's larger.
Then I realized that I have an extra drivehaft from my 56 8cyl parts car.
I checked that one and there's no play int he joints. I check those joint
housings and they are the same diameter as my 6 cyl housing. So that not the
housing I got from the parts supplier. I'm here in the house now trying to
figure out what it's for.
My plan was to sell it, and jut put the v/8 driveshaft in the 6 cyl car. the
look the same.
So now I look in the parts number book and it shows the 6 cyl drive shaft is
54 5/16 long and the 8 cyl driveshaft is 54 7/16 long.
It shows a different housing for an 8cyl and a 6cyl, but it shows it as the
same joint.
Anybody know what the actual difference ?
Can I use the 8cyl shaft in the 6cyl car. Why is there 2/16 of an inch
difference. Maybe I need to study the driveshaft more closely.

Any insight would be appreciated.

Thanks,

Nick

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