2019 Buick Stock Appearing 2019GS Nationals Buick Stock Appearing RULES 1. This class is for STOCK APPEARING and STOCK SOUNDING Buicks from the years 1960-1976 only with no visible modifications. No fiberglass. Factory glass must be in place. 2. Full interior must be stock including shifters. Aftermarket safety belts and roll bars ok. Aftermarket gauges ok. 3. Engine compartment must appear stock. No aftermarket headers or carbs. Iron exhaust manifolds must be retained. Stock, Edelbrock B4B/Performer, and Poston S-Divider will be the only intake manifolds allowed but they must be painted engine color. Stock Iron, Stock Aluminum, TA aluminum Stage 1, Edelbrock and Bulldog aluminum stock appearing cylinder heads legal but must be painted engine color. Casting numbers and date codes will not be checked. Stock fuel pump and stock fuel line from stock pump to carb must be in place. Electric fuel pumps ok. Stock appearing alternators only. Wiper motors must be in place. No electric water pumps or electric fans. Very minor chrome dress up items are allowed. No visible underhood cool cans. Any ignition may be used, but distributor must appear stock. Air cleaner must be used. Stock air cleaner lid may be inverted, and drop base 360 degree air cleaners are legal as long as tastefully done. No aftermarket ram air systems. 4. Any gear/ GM trans/converter combination ok. No clutchless transmissions or Trans brakes. 5. Factory front and rear suspensions only. Rear upper adjustables ok as are "No-Hop Bars". Front sway bar optional. Aftermarket springs, shocks and air bags allowed. GM rear ends only. Brake upgrades limited to stock type and must be stock appearing. 6. Cars must run full mufflered exhaust exiting at the stock location. Any pipe up to 3” is acceptable. 7. Factory and factory appearing wheels only, limited to 10" width. 8. Stock fuel tank must be in place. No lowered sumps. No externally mounted gauges. 9. Rear tires are limited to 10 tread width. No fenderwell modification allowed except minor lip alteration. 10. No advertising, lettering, or decals on exterior of car. Unlimited "all run" field. Cars will be run BRACKET STYLE, using a Pro Tree. Each car will make 2 qualifying attempts, and your best E.T. during qualifying will be your dial in, or index. Cars will be paired using a Sportsmans Ladder where #1 qualifier races #2 and so on.