Not the first one to do this but I did it a bit different. After welding washers on
@Plumber32 machine a few weeks back I figured it was time to do my own. I really like the added beef on the A-arm tab but I didn't like the Allen head screw. I spent a lot of time surfing eBay for bolts and found a Polaris M10x1.5 230mm (7518472) OEM zinc plated grade 10.9 flange head bolt. It's a sportsman upper control arm bolt.
@Neohio sent me a few of his weld washers and I turned 2 of them to fit the flange bolt rather than the McMaster bolt he recommended. What I ended up with was a snug fitting bolt and nut flange inside the weld washer.
Comparison picture of the OEM bolt vs new. Now before someone says the rear a-arm tab is on the thread, keep in mind we still need a weak link somewhere. With the snug fit of the nut flange in the weld washer Im already load sharing the portion of the bolt that's threaded and if something had to break replacing the bolt is cheap and easy, in reality the tight fit on the bushings in the a-arm tabs drives any side to side load into the inner face of the a-arm tabs anyway.
Test fit
Front welded
Rear welded. Note that I used the OEM bolt for set up rather than my new bolts so I didn't get weld spatter on the new threads
New bolt test fit and perfect fit at that
Painted and back together