K so i finally found a 10 bolt posi rear end for a decent price, i had to get the spring perches moved back some but everything else bolted up fine.. but the yoke is a newer style with the clips on the inside and the u-joints i have are just a little to small.. can you but a u-join with liek the stock size on one end and a little bigger on the other?

Yes you can. I think they call them conversion u-joints. Call any driveline shop and they should be able to hook you up.
Bill