Review on Allstar ALL60201 Upper Control Shim by Jay Swearengin

Larger and stiffer than those used commercially. The tab also sticks out higher so it was easier to grab. I used them to get a little more lag than the standard GM spec and they worked great. I was a bit concerned because they are for 1/2" bolts and the bolts were 7/16 on my '69 GM A-body, but they worked fine. They were a little wobbly when I first put them in, so I used painters tape. to hold them in place while I tighten the screws. great product