Having the belts anchored to the seat is not legal. The best way would be to have them anchored to the required cross bar. This from the NHRA rule book: "Sidebar must be included on driver's side and must pass the driver at a point midway between the shoulder and elbow. Swing-out sidebar permitted. All roll bars must have in thier construction a cross bar for seat bracing and as the shoulder harness attachement point; cross bar must be installed no more than 4 inches below, and not above, the drivers shoulders or to the side bar." There are more regs on bracing etc, so I suggest that you get a rule book and look up 4:10 ROLL BAR on page 261.Tomlowe523 said:If I get an aluminum seat from Kirkey or something could I weld blocks on to the back of the seats then drill and tap them, then bolt the belts to the seat?