All thermostat installation instructions are in a download file.
You will find instructions on installing:
Bypass Thermostat Instructions 
Gasket Installation Instructions
GM Bracket Thermostat Installation Instructions
Heavy Duty Weirstat Installation Instructions
Offset Thermostat Instructions
Rubber Seal Thermostat Instructions
Testers & Adapter Instructions:
For Locking Fuel Caps
For Pre-Vent (Pressure Release) Locking Fuel CapsFor Quick-on Locking Fuel Caps
- INSTRUCTIONS: To Install - Rotate cap to RIGHT until cap ratchets "clicks" on filler neck 3 times. To Remove - Insert key. Hold cap and rotate key left ¼ turn to start pressure release. After hissing stops, rotate cap left until fully removed. DO NOT USE KEY TO ROTATE CAP.
For Metal Push On Locking Fuel Caps
- INSTRUCTIONS: To Install Cap: Rotate cap to Right until cap ratchets (clicks) on filler neck 3 times.
- To Remove Cap: Insert key. Hold cap and rotate key left ¼ turn until it stops. Then rotate cap left until fully removed.
- Do not use key to rotate cap.
- To Remove Key: Rotate key Right ¼ turn.
- INSTRUCTIONS: To Install - With the key removed, push cap into filler neck until both lock bars engage under the filler neck cams with an audible "click:. Do not turn cap. To Remove - Insert key. Rotate key slowly 1/4 turn to retract lock bars. Cap can now be removed from neck.
