Pure Stock Drags basic rules.....

Since I mentioned the Pure Stock Drags quite a few people have asked how they can enter their cars and what's allowed. I don't have the time or space to list the entire rulebook, but I can give you the basic guidelines, and their pretty lenient for the enthusiast who wants to race his original or clone musclecar. # 1. Engine / Transmission combination. Does not have to be numbers-matching, but the combination has to be one that was an option on that model car, that year. For example-you can't have a 454 in a '67 Chevelle, because the 454 didn't become an option until 1970. On the other hand, you can put a 426 Mopar crate Hemi in a '71 Charger, because although rare, the Hemi was available that year. Same thing for transmissions- if you want to take a six-cylinder, three-speed '69 Nova and swap in a 396 and a 4-speed, you can do that, because that combo was an option that year. However, if your "Macho T/A" has a Doug Nash / Richmond 5-speed in it, you may have a problem, because both the "Macho" package and the 5-speed tranny were not factory options. They were dealer-installed options performed by Mecham Pontiac in Glendale Arizona. Dennis and Kyle Mecham ( "DKM" Inc. ) sold about 300 cars a year from 1977 to 1979, but they were sold as used cars and never had an MSO ( Manufacturer's certifcate of originality ) from General Motors. This is why they were'nt allowed to sell them in California or Colorado. # 2. The engine has to be within 15 cubic inches of it's original size, either way.  For example-the guy that won a few years ago had a 1969 Mustang Mach 1 that was originally a 428 CJ model. Not wanting to risk throwing a rod out the side of a rare, numbers matching block, he took a 390 truck block and put a replacment Eagle 428 crank in it, with special pistons and the CJ heads, intake and carb, and a Lunati reproduction of the the CJ cam. It only displaced 415 cubic inches, but it was legal because it was within 15 inches. Similarly, a guy who had a VERY strong clone 1963 Super Duty Catalina who was running a .030 over 428 Pontiac block was legal because it was 434 inches-within 15 inches of the original 421 cube displacement.  # 3. Induction. You've got a lot of latitude here. For example-the carb(s) only have to be the original "Type." So, if you have a strong 455 Pontiac, Buick or Olds you could run an 850 cfm Q-jet instead of a 750, because their the same type. If you had dual AFB's on your 409 Impala, 421 Catalina or 426 Hemi Mopar you could run dual 750s for a substantial power gain over the stock 625s and still be legal. You could also run dual 600 or 750 Edelbrocks because their virtually identical to an AFB. If you have a 440 '69 GTX-you could run an Edelbrock 800 cfm Thunder AVS carb and gain a ton of power over the stock Carter AVS which only flows about 585 cfm. Your legal because the design is identical-falling under the same "type" rule. The rules are similar for intakes. For example-the guy with the clone SD-421 Catalina was legal running an Edelbrock P65 dual-quad intake because it was identical to the original aluminum factory unit. He'd have been legal with an Offenhauser dual-quad intake as well. If you have a '70 Z/28-GMPP is still selling an exact replica of the original Z/28 / LT1 intake, and the Holley # 300-36 is the same design. Both would be legal under the same "type" rule. # 4. Cams-again the same "type" rule applies. What this means is, if you have a  '69 396 Chevelle you could run a hydraulic or solid-lifter cam because the L34 396 was a hydraulic-cammed version, and the L78 was a solid-lifter cammed model. By contrast if you had a '69 GTO you could only run a hydraulic cam, because there was no factory solid-lifter option-even the vaunted Ram Air IV was a hydraulic design. However, they don't restrict what duration or lift you can run. # 5. Exhaust. You have to run Iron exhaust manifolds-no headers. However they can be ported or extrude-honed for extra flow. The pipes have to go over the rear axle except for stuff like the Challenger T/A, where the factory setup exited in front of the rear wheels. However, there's no restriction on pipe size, so you could run 3 inch pipes if you wanted to. # 6. Driveline. The trans has to be the stock "type." In other words-you can run a Saginaw or Muncie 4-speed, or a TH350 or TH400 in a '70 Camaro, but you can't run a 700R4 automatic overdrive or a Richmond or Tremec 5-speed stick. You can pretty much run any converter you want, and any gear ratio you want. You can see now how these cars run the blistering times that they do-they look stock, but their really not. However-they are a blast to watch or participate in, and I whole-heartedly recommend doing it if you can. Mastermind