Here is the relevant section of the SCCA rules that your car must comply with. Note that there is no specific rule about cracks in the windshield, it is a judgment call based on whether the car is deemed to be safe or not. If the crack is in the passenger side, and is not severe, it will probably be ok to run.
SCCA safety inspection rules:
QUOTE
B. Inspection Requirements
1) All loose items, inside and outside the car, must be removed.
Hand held items, such as but not limited to, cameras and cell
phones are considered loose items.
2) Passenger’s seat back and all cushions, bolsters, headrests,
etc. must be secured. All allowed aftermarket replacement
seats (i.e. driver and passenger) must be securely and safely
mounted. Special care should be taken when using other
than OE mounting points and/or fabricated bracketry.
3) Any cameras, if installed, must be securely mounted to withstand
loads from driving maneuvers. The camera may be
installed either inside or on the outside of the car. In either
case, its mounting method and position must not interfere
with driving or pose an additional hazard to driver, passenger,
or course workers.
4) Snap-on hubcaps, detachable fender skirts, and trim rings
must be removed.
5) Wheels must be safely affixed. They shall not be reversed so
that the lughole taper does not mate with the chamfer of the
lugs. All studs and lug nuts must be present and functional.
6) Tires must be in good condition, with no cord or belts showing
or cracks in the tread or sidewall. Each tire must have measurable
(i.e. exhibiting positive measurement values) tread
depth at no less than two points on the tire which are 180
degrees apart around the circumference, and which are
within the center one-half of the tread surface that normally
contacts the ground. Tires may not have cord visible at any
time during competition. For categories other than Prepared
and Modified, tires may not be regrooved, nor may grooves
be added to the tread pattern where none existed on the
original tire.
7) Seat belts (and harnesses if used) must be properly installed
with attaching hardware, in good condition, secure, tight, and
in compliance with Section 3.3.1.
8) Throttle return action shall be safe and positive.
9) No excessive fuel, oil, water or brake fluid leaks should be
observed when the engine is running. For all Prepared and
Modified category vehicles, engine crankcase and radiator
overflow/breather lines must terminate in containers of at least
one quart capacity. These containers cannot be vented into
the driver/passenger compartment. All Prepared and Modified
category vehicles must be equipped with an engine oil
vent tank, and an engine coolant vent tank if coolant is used.
Vent tanks are not required with systems which are completely
closed, i.e. have no venting to the atmosphere. All oil
lines passing through the driver/passenger compartment
shall be made of metal braided hose with AN Series threaded
couplings; or entirely covered and protected with a metal
cover (this does not apply to the small oil lines used for
mechanical oiling system gauges).
10)Steering “spinner” knobs shall not be permitted.
11)No broken or missing spokes or more than one loose spoke
per wheel shall be permitted in wire wheels. No cracks shall
be permitted in disc or cast wheels. Other than standard parts
as defined by these rules, non-metallic wheel construction is
prohibited (FSAE cars are exempt from this requirement
since the FSAE rules allow non-metallic wheels).
12) Brakes must have an adequate pedal, sufficient fluid in the
master cylinder and no apparent hydraulic leaks under pressure.
Vehicles must have a brake mechanism acting upon
each wheel. The braking system shall be a dual system,
arranged in a manner to provide braking for at least two
wheels in the event of failure in part of the system. In the
case of OE single systems, this requirement may be satisfied
by a functional, redundant emergency brake. Karts are exempt
from this requirement.
13) All swing axle cars, except Porsche, must have a camber
compensator, or negative camber on the rear wheels, or have
axle-limiting straps. Stock pre-1967 Volkswagen straps are
not sufficient.
14) Wheel bearings, shocks, steering, and suspension shall be in
good operating condition.
15) Exhaust must exit behind driver or to the side of the car.
16) On-board starters shall be provided.
17) Any wet-cell battery moved from the manufacturer’s original
location shall be in a non-conductive marine-type container
or equivalent, and the hot terminal shall be insulated. All
batteries (on-board power supplies) shall be attached securely
to the frame or chassis structure independent of the marinetype
container. NOTE: This will allow the use of gel cell or
dry cell (AGM) batteries without a non-conductive marinetype
container where applicable.
18) Roll bars, if installed, must meet the applicable portions of
Section 3.3.2 and Appendix C, with specific attention to roll
bar height.
19) Helmets for all occupants of the vehicle are to be inspected
for condition, fit, and compliance with Driver’s Safety Equipment
- Helmets (4.3.1).
20) Flex fans are not allowed.
21) Alcohol may not be used in manifold injection or spray bottles
unless it is specified for this use by the OEM.
22) For cars competing on non-DOT-approved tires, the vehicle
safety requirements as referenced in each category’s rule set,
in addition to those in mandatory sections of the Solo Rules,
shall be adhered to by all entrants.
3.3.4 Vehicle Operating Condition
Any car that is judged by the Event Chairman to be in an unsafe
operating condition at any time during the event shall be barred
from further competition until the deficiency is corrected to the
satisfaction of the Chief Technical Inspector.
