I just finished installing BMR's bolt in relocation brackets. My impressions:
The install took me about 3 hours, much longer than I expected. That includes two quick trips to the hardware store.
BMR includes two bolts to attach the brackets to the LCA mounts. They should include four because the stock bolts are not long enough to reuse. Also the relocation brackets are a little wider than the stockers so I put a washer on each LCA bolt to tighten it up.
BMR's instructions say to use a 7/8" socket on the lower shock mount. That was a little loose. I'm guessing it's a metric size, but it was bigger than my biggest metric socket so I made inch sockets work, but it wasn't right.
Also it was necessary to grind some material off the big round weights or whatever they are that are next to the calipers so they would clear the brackets, although BMR's instructions do not mention that. It sure is nice to have air tools!
Of course the best part of any mod is the test drive after the project is done. I took it around the block and spun 'em and it seemed to hook up quicker than it did before. I'll have a better idea of how much difference they make after I drive it for a few days.

 

Interesting, because the instructions for the weld in ones refer to having to modify the brake caliper weight and also talk about adding washers to the inside of the stock control arm. I would send them an email, so they can check up on the instructions. They won't mind.

I did not have to modify the caliper weights when I did my bolt-ons. They are very close, though. I don't remember if mine came with longer control arm bolts or not. I may have gotten them with the BMR LCAs I already had (I have the original ones in a bag). All I know, is that I did not have to go get any extra parts.

 

I had already looked at their installation instructions online for both brackets so I was not really caught off guard having to "clearance" the weights. http://www.bmrfabrication.com/instructions/cab002.htm shows their instructions for the bolt ons and there is no mention of modifying the weights or adding washers (which were not included).
The stock LCA bolts were long enough for the nut to go on only two or three threads, which I certainly would not consider safe.