A single fuel pump bracket that covers 66mm, 61mm and 50mm inside diameters, so one part handles the three body sizes that account for most aftermarket pumps. That flexibility is genuinely useful if you are not yet certain which pump the build will end up running, or if you expect to upgrade later. Mounting a pump properly matters more than most builders realise: an unsupported pump hanging off its own fuel lines will fatigue the fittings and eventually crack a hose end, quite apart from the noise it transmits through the body. Bolt the bracket to a solid panel or chassis member, use the appropriate isolating bush for the pump diameter, and the installation will stay put.