My best recollection is that all the 6's use the same bearing from '60-'65 and maybe newer.
This listing shows it being used on the 10" clutch V8 model too.
https://www.carpartsdiscount.com/clutch ... 93=1058391
I neglected to mention you may want to check a couple of things while you
are under the chassis.
Front of the diff near the u joint oily? Good time the replace the pinion seal.
If you are keeping the 2.77, oily tail shaft/yolk? Replace tail shaft bushing.
Shift leavers oily? You guessed it there are seals for it too.
When you get the trans and bell out it probably will be oil inside the bell. If the oil
smells like 90wt the leak is coming from the front seal in the trans, it right
behind the release bearing. If it smells like motor oil it's coming from the
engine's rear main seal. It's a separate job. Got to pull the oil pan off to get
at it.
When you have the trans out I would change the gear oil in it. Once it's back
in the car you'll need a suction pump to fill it unless your trans tunnel (floor)
is really rotten!
Just so you know there isn't any speed advantage by using the 3.03 vs the old 2.77
as both 3rd gear ratio is 1:1, no overdrive. There is an advantage w/the 3.03 in
that it has a syncro 1st gear where the 2.77 doesn't. This means w/the 2.77 the
car has to be stopped before you can shift in to 1st gear. Makes it a bit of of a
pita to drive. There is a T-5 trans that alot of folks use but requires some modifications,
welding, shortening the drive shaft, ect. All said and done abt $1K. Stock used in
Chev S-10 p/u and Mustangs. It's 5spd w/od 5th gear.
GL
Terry