1. Weld In Full Length with seat braces (MM, Steeda, UPR)
2. Weld In set brace (Steeda, UPR, Blue Oval Industries)
3. Bolt in and any darn one will perform the same (avoid these)
What he said. The best ones are through the floor connectors... but that's a huge job. Global West makes nice tubular ones as well, but tubular doesn't offer the same ground clearance as the boxed ones that hug the contours of the floorpan.