Gears & Axles - U-joint for 1LE DS

I just got a 9" and Im fitting the stuff together..
I have a 1LE aluminum driveshaft I think that I bought used awhile ago,
I bought a 447 u joint for the instal and when I went to put it on the driveshaft the u joint part is too big.
The 1LE shaft holes are smaller than whatever comes on the small side of a 447 u joint.
So my question is, what u joint do I need to make it work? I remember hearing the stock side of the 447 is a little bigger than a real 1310, is the 1LE a 1310 size?
I need a XX-1350 U joint, where can I get one locally

I just got a 9" and Im fitting the stuff together..
I have a 1LE aluminum driveshaft I think that I bought used awhile ago,
I bought a 447 u joint for the instal and when I went to put it on the driveshaft the u joint part is too big.
The 1LE shaft holes are smaller than whatever comes on the small side of a 447 u joint.
So my question is, what u joint do I need to make it work? I remember hearing the stock side of the 447 is a little bigger than a real 1310, is the 1LE a 1310 size?
I need a XX-1350 U joint, where can I get one locally

You might have to get a 1350 driveshaft, I don't know if spicer makes a 5-3147X to a 5-178X conversion u-joint. Your 5-3147X is closer to a 1330 that a 1310.

I measured it with some calipers, the hole in the DS is 1.0625"
Anybody know a store that carries a selection of u joints, like NAPA maybe?

I don't know what DS you have, but the 1LE driveshaft is not any different on the 98 and newer cars. For the older cars, it was alum where the stock DS was steel, but as far as I know it was a direct bolt in and the U-joint was the same.