U-Bolts: To re-use or not?

AMK has the correct long lock nuts also. Just spend the money and get one of their big catalogs. A lot of neat bolts and other stuff needed on our cars.
EVERY Mopar that I have worked on in the last 45 years has had the flattened rear end U bolts.. I've seen other makes of cars that don't or didn't use the flattend bolts and the rearend housing would actually be pinched down under the round stock of the U bolt. I think the original Mopar ones are still available also. They used to sell I think 3 different lengths also. I'll look the part numbers up and see if they're available yet