Group 1

Cars in this group include Mustangs, Corvettes, Cameros, Cobras, V-8 powered sports racers, and other similar amazing cars.

Group 1 Representatives

Have a question about the cars in this group? Contact the Group 1 Representatives:


Classes:

  • A-Sedan — Trans-AM (AS)
  • A-Production (AP)
  • B-Production (BP)
  • FIA
  • A-Sports Racing (ASR)
  • A-Sedan Heritage (AS-H)
  • B-Production Heritage (BP-H)

A-Sedan – Trans-AM (AS)

Cars that ran in SCCA A-Sedan or Trans-Am prior to 1973. Examples are, Camaro, 1964-70 Mustang, Challenger, and Javelin.

  1. Maximum cubic inch of 310 is based and limited to maximum allowed over bore and stock stroke.
  2. Roller rockers of any type are allowed.
  3. Heads must conform to practice of the prepared year and be OEM with a casting number available before or during 1972. For Guidance please contact a group representative. Chevy 034 Bow Tie heads are permitted as substitution for 492 angle-plug family heads in AS/TA through the 2010 season, but not in 2011 and beyond.
  4. Ford Boss heads may not be used on 1968 or earlier Ford cars.
  5. All brake calipers must be of period design and available in period.
  6. Maximum wheel width is 8”, maximum diameter is 15”.
  7. Fiberglass fenders and doors are specifically not allowed.
  8. Dry sump tanks must be mounted within the engine compartment.

A-Production (AP)

Cars that ran in SCCA A-production prior to 1973. Examples are Corvette 427/454/350 LT-1, 390 AMX, Shelby GT-500, 427 Cobra.

  1. Maximum over bore of stock bore is limited to 0.060”.
  2. Maximum cubic inch is based and limited to maximum allowed over bore and stock stroke.
  3. Roller rockers of any type are allowed.
  4. Heads must conform to practice of the period year and be OEM with a casting number available before or during 1972. For guidance please see a group representative.
  5. Multi-disc clutches are not allowed.
  6. 289 powered (or 302) Cobras with Webers will run in A/P as per 1965 SCCA specs.

B-Production (BP)

Cars that ran in SCCA B-production prior to 1973. Examples are Corvette, 290 AMX, Shelby GT-350, 289 Cobra.

  1. Maximum over bore of stock bore is limited to 0.060”.
  2. Maximum cubic inch is based and limited to maximum allowed over bore and stock stroke.
  3. Roller rockers of any type are allowed.
  4. Select Ford powered cars are allowed a 302 in place of a 289. They are 289 Cobras, Shelby GT-350’s, and 260/289 Tigers.
  5. Windsor heads may be substituted for 289 HiPo heads on Ford cars. No BOSS 302 head. Heads must conform to practice of the period year and be OEM with a casting number available before or during 1972. For guidance please see a group representative.
  6. Lincoln brakes not allowed on Shelby GT-350.
  7. Multi-disc clutches are not allowed.
  8. Control arms must be OEM or OEM replacement parts such as units manufactured by Moog, etc. Tubular control arms, such as manufactured by Global West are not allowed. The control arms may be modified and reinforced and the ball joints may be changed, but must remain automotive style. Pivot point material may be changed from rubber to polyurethane or steel, to include the substitution of spherical rod ends. Control arms must be mounted to the chassis in the same manner as stock.

FIA

CVAR FIA/IMSA class includes naturally aspirated cars that were raced before or during 1974 in FIA groups 2, 3 or 4, IMSA or RAC Modsports. (FIA group-5 is classified as ASR in CVAR.) Cars must have period race history and be run in period configuration, or be an exact clone of a historical racecar using a brand-authentic car base.

  1. Clones must faithfully emulate a specific car as raced, exhibiting the same combination of bodywork, engine, transmission, brakes, and wheels packaged in period.
  2. All clones must start with an authentic manufacturer chassis.
  3. No replicas or continuations.
  4. No mixing and matching configurations between model variants.
  5. Paint and trim are free.
  6. No turbos or superchargers.
  7. No tube frames.
  8. Must meet minimum weight as raced in period.

Entrants must provide documentation of proper specifications and pictures of the exemplified car when CVAR does not already have such information. If you present a car for FIA, it is your responsibility to show it has the same look (except color/graphics) and mechanical specifications as run in period. Above all else, the entrant must be able to carry on an informed conversation about his car with an honest and reasonable explanation for any attribute of his specimen of automotive history.

FIA/IMSA Exceptions

  1. Allow any tire (slick or treaded) that fits authentic rims and flares.
  2. Allow OEM heads that retain original design, appearance, dimensions, material, port spacing, flow, and valve diameter, with intent to replicate period performance.
  3. Allow aftermarket replacement blocks that retain original design, appearance, dimensions, and material, with intent to replicate period performance.
  4. Allow aftermarket engine internals with original dimensions.
  5. Period-correct carburetors may replace mechanical fuel injection.
  6. Maximum overbore from stock is 0.060”.
  7. Allow roller rockers.
  8. Dry sump allowed in any car.
  9. MSD or other electronic ignition allowed, but no crank fire.
  10. Allow substitution of single-plug ignition in place of twin-plug
  11. Allow roll cages through firewall or bulkhead.
  12. Cosmetic body panels attaching to the original chassis may substitute fiberglass for metal.
  13. Lexan allowed in place of glass.

FIA/IMSA Guidance

Our intent is to replicate, not reinvent, history. If we are doing our job right, finishing order should resemble history. If you want to go fast, pick a fast car in period, and prepare it faithfully. Do not boost performance with modern technology. As of September 2008, we have information on:

  • Panteras
  • Jaguars
  • Porsche 72 ST, 73 RS, 73 RSR, 73 IROC, 74 RS and 74 RSR
  • 68-74 (C3) Corvettes

You can prepare a car to one of those specifications or provide data for another model raced before or during 1974. Examples of documentation on file for existing cars are:

  • letters from original owners providing specifications and pictures
  • race results from the period
  • copies of rules that the car ran under
  • builder’s notes describing equipment used
  • magazine articles or periodicals about the specific car
  • copies of bills of sale showing ownership succession, etc.

Simply providing a picture of a car running on some track somewhere with no other documentation does not qualify.


A-Sports Racing (ASR)

Mid-engine, V-8 powered sports-racers on slicks or treaded tires. Other sports-racers with slicks or 4-valve engines. Examples are Chevron B19, Lola T212, McLaren-Chevy; Genie-Buick

  1. Can-Am cars run thru 1974 are allowed.
  2. Turbocharged cars are not allowed.

Recognition- Heritage Status

Recognize the cars within Group 1 that are authentically prepared. These cars exemplify the heritage from which we originated. ‘The Cars are the Stars’ are embodied by those that have resisted the temptation of more modern components in the interest of strict adherence to the original (’62-’72) GCR car preparation rules. This may also include cars that have period history that is most important to retain. These cars will be recognized as “Heritage Status”. There will be different levels of Heritage Status that will be the owners choosing. At the Diamond level, we are working with other clubs to make CVAR cars eligible to premier events and invite others to our races:

  1. Those conforming to original (’62-’72) GCR may apply for Heritage Status. The Authenticity Chairman intends to create a group that will evaluate applications. Applications will be judged by, but not limited to:
    1. Actual historic race history.
    2. Exceptional adherence to original (’62-’72) GCR car preparation rules.
    3. Authentic Car Presentation (Aesthetics).
  2. Cars achieving Heritage Status will be presented with a CVAR dash plaque as well as (TBD) decal in order to easily recognize these vehicles on track.
  3. Heritage Status cars will be identified as such on time sheets
  4. A different Heritage Status Car will be selected at each event to be featured in the CVAR newsletter and, when possible, national publications such as Victory Lane as part of event race coverage.
  5. A separate points category will be established in order to award Heritage Status cars their individual Season Champion.

Heritage Status Levels

  1. Any car using period Mechanical drive line parts (heads, cam, trans, brakes) will automatically qualify for Heritage Status race classification on track.
  2. Emerald Status- Period correct interior and exterior appearance and presentation at a high level. Cars will have exterior designation as well as special logbook designation.
  3. Diamond Status -Period Correct, all parts are as they were in period. Cars will have exterior designation as well as special logbook designation. CVAR is negotiating reciprocation with other clubs for elite classification- i.e. (SVRA Gold Medallion) This would allow entry to any elite event nationwide.
  4. Period History- This will be an additional “Wreath” designation for verifiable “in period” race history.

Accommodation

In order to accommodate better reliability, parts availability and the ability of members to “run with other clubs without having to re-engineer their cars,” Group 1 classes A-Production, B-Production and A-Sedan/Trans-Am will adopt the updated exceptions and clarifications contained in Exhibit A.
This rule package is still based on the original (’62-’72) GCR car preparation rules.

It is intentionally consistent with other Vintage clubs across the nation.


Return to Groups.