The MW A-Arm jig simplifies installing an a-arm front end on a dragster or funny car chassis. The 2 adjustable uprights have two mounting positions for MW, P&S or Anglia type front spindles. Lower position when using 5" aircraft wheels and the other for standard 17" dragster or 15" FC spindle mount front wheels. The uprights can be positioned for any desired tread width on the 1-1/2" square cross tube included with the kit. Installation - Service instructions can be found on Service Bulletin #0026.