Most of the Ford (anything with a Big block) HP engines were equipped, from the factory, with 1330 U-joints and large diameter driveshafts. As always, after the cars have been on the road for a while, anything can happen. So, take the above advice...measure what you have first. What are you building that won't be held by a 1330 U-Joint, a rock crawler Off-road Bronco is where I would expect to see that...maybe a 7-8 sec bracket racer?
The 1350 U-joints, aren't they OEM on trucks?, are not something you will find on your average passenger car. What is it you are trying to do. If you really need the peace of mind of a 1350 U-joint and are going for an upgrade driveshaft, isn't it easier to just have the rear saddle changed to take a 1350 and purchase a transmission yoke that will take a 1350? That way you don't have to worry about finding a hybrid?
I realize it will probably cost more, but if you are upgrading now, seems like this is as cheap as the swap will ever be. If you do it later, then you have to throw away the old stuff.
I am not questioning your thinking, just wondering if there is something I need to look at too?
[ This Message was edited by: Beoweolf on 2/2/04 10:59pm ]