Here are the measurements for the U-bolts that I used for my D60 / 14bff swap.,,
14bff- 4qty..... 3 3/8 inside width X 10" 5/8 dia grade 8
D60- 2qty..... 3 1/8 inside width X 10" 5/8 dia grade 8
1qty..... 3 7/8 inside widtg X 10" 5/8 dia grade 8
2qty..... 9/16 X 3" grade 8 course thread bolts
I bought them locally but i am sure they will shipp
.DenverSpring & Suspension Inc
303-295-7638
3510 Brighton Blvd
Denver CO 80216