The brake system needs to...
The brake system needs to be inspected and rebuilt in its entirety. That means all seals, pads, flexible lines, fluid, damaged steel lines, and so on, will need to be fixed or replaced. If your rotors are excessively cracked or worn too thin, inquire as to the latest technology for these items from your brake manufacturer. Rotor failure is always serious. Oil-filled hubs, like the Wintters 007 above, should also be serviced.
7. Carburetor Maintenance - Remove your carburetor and disassemble it. Do a thorough cleaning at the very least. Inspect all of the moving parts. Order a new gasket kit and consider replacement of all of the parts that can and do go wrong at some point in time. These include the power valves, the accelerator pump, seals, and more.
Look outside the carb and inspect the linkage from the gas pedal to the carb. Replace the return springs no matter what they look like and also the ball sockets if they appear to be worn. Now might be a good time to send it off to an expert to "tune" it for more performance.
8. Rearend Maintenance - When disassembling your rearend, make sure you note the condition of all of the parts. When first draining the rearend grease, run it through a filter to see if there are any tell-tale metal bits or pieces that may indicate a part failure.
Look over the gear wear pattern as well as the bearing play and any obvious cracks in the housing that may only be seen from the inside. Now is the time to decide whether to replace the center section, a right or left bell side or one of the axle tubes.
Go through your cooling system...
Go through your cooling system and check for corrosion, cracks in the radiator, old hoses, worn belts and leaking water pumps. If your belts and hoses have not been replaced lately, do it now. A failure later on will most likely cost much more.
If you're running a Detroit Locker-type of rear differential, note the age of the springs. These must be replaced periodically. Ask your manufacturer how long you could expect yours to last under your racing conditions.
Other aftermarket differentials designed for traction enhancement should be looked over closely. There are lots of moving parts, some of them built out of aluminum, that need close inspection. It would be a good idea, since you now have the time, to send these types of units back to the manufacturer for rebuilding and/or repair.
The same goes for the transmission. The bushings and bearings in the tranny will wear out. Don't expect a transmission to last a lifetime. Be sure to match that tailshaft bearing to the proper yoke. Roller bearings require a special hardened slip yoke.
9. Shocks - Shocks are one of those items that can make your setup ideal or, when they fail, ruin an otherwise great package. You must check every shock you use on a regular basis to make sure they are not leaking and that the internal parts are functioning properly.
At the end of the season, either return them to a repair facility or rebuild them yourself. The oil will need to be changed and the seals will need to be replaced. These parts are not intended to last very long. The heat and force the shock is subjected to is extreme.
Check to make sure your alternator...
Check to make sure your alternator is charging correctly and that the bushings aren't worn. Now is a good time to check the belts for proper alignment with all of the pulleys.
Once the shocks have been rebuilt, make sure they are run on a shock dyno and keep a record of the rates. You will be referring to these many times in the future when you are deciding which shock should go on which corner of the car.
10. Shop Layout and Requirements - One of the ingredients for a successful racing operation is the space in which you will work on your car. The tools and layout of this area will contribute to how efficiently you set up and maintain your race car all year long.
Every shop should have enough space available for all of the functions needed throughout the season. A surface plate or an area level enough for setups is a must. All of the tools as well as a pneumatic source and an electrical source should be within easy reach.
A well designed shop has all of the maintenance and replacement parts and spares available. Spare radiators, hoses, carburetors, alternators, rearends, transmissions, ignition parts, spindles, and control arms and tie rods, are just a few of the parts that should be on-hand in the shop and the race trailer and available if needed.
You might consider setting up a separate engine room if you build your own motors. This clean room could serve as your shock dyno and computer room too. Here, you can clean carburetors, rebuild shocks, provide storage for sensitive electronic equipment and keep notes stored away for future use.