U joint doesn't fit

[Z06killinsbf]

Background: 66 mustang, explorer 8.8 swap. Previous rear was stock 8". I bought a 1310-1330 conversion u joint, the driveshaft side is too small to fit the 1-1/16" caps so I bought a u joint for a 63 Falcon with 1" caps but the ID of the cap is too small for the shaft/post of the 1310-1330 adapter. What other options are out there for me?

[racrguy]

They should make bastard u-joints. Any decent parts guy with measurements and a book should be able to tell you if something like that is available. You'll need the OD of the caps, the measurement from outside to outside (the cross measurement) and where the snap rings are.

Edit: or take your driveshaft down and have the end cutoff and adapted to the same u-joint as the rear.

[homealone]

The 1310-1330 has always worked for me.

BUT, I have found that 4 out of 5 times, the ones on the shelf are mis-boxed.

Also, Autozone and OReilly carry 2 brands. One will have 2 extra cups in the box which you may need.

[kobuzz]

Ft Worth Gear and Axle has bastard U joints. Just got one a couple weeks ago for LS1 driveshaft to 9" Ford

[Chas_svo]

Precision makes a slide rule with the caps and widths to get the correct conversion ujoint.