On the subject of the proper grade
LCA hardware; I bought that hardware set from LRS earlier and comparing it to the original hardware it was obvious they were not comparable quality. I wanted to get the car done ASAP so I used them anyway and when I went to torque the
LCA bolts to spec they immediately stripped out.
After some searching and calling around I found a Lincoln dealer (they really sell only Lincolns) 2 hours away that had the proper OEM grade 10.9 flange bolts. For what it's worth the guys at the parts desk said
suspension hardware should always be grade 10.9 (Grade 8 SAE as already mentioned). The difference between the bolts is night and day. The hex head is taller for more bite from your socket, the tip is tapered, it's the proper coating, etc...
In LRS' defense when I called, Jay said if I send him a picture of the striped bolts he'll give me a credit for the kit. Problem is I can't even get the nuts off now, I guess I'm gonna have to cut them off but I just haven't had the time to work on it yet.
Picture of the new OEM Ford bolt next to LRS':
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