Pipe Plugs and Adapters:1/2-inch pipe plug-Aeroquip FCM-3749 (for plugging unused temperature sender hole)Adapter busing (1/2-inch male to 3/8-inch female)-Aeroquip FCM-2139 (for adapting 3/8-inch temperature sender)Pushrods: Refer to enclosed instruction manual.Headers: Will fit most headers. Check for proper fitment before installing heads on the engine. Refer to the Checking Header Clearance section in the instruction manual. Spark Plugs: The following spark plugs are recommended as a starting point:AC-FR3LSAutolite-324Champion-RC9YCNGK-FR5
Note: Make heat range adjustments based on tuning results. Blower and nitrous applications will require you to run a colder heat range spark plug. Try several heat ranges as needed.
Important Information For Emissions InspectionTrick Flow Specialties 23-Degree Aluminum Heads for '95-and-earlier 262-400-cid Chevrolet gasoline engines PN TFS-30400001 has been found not to reduce the effectiveness of required vehicle pollution control devices and are therefore exempt under California Vehicle Section 27156 permitting the advertising, sale, and installation of these parts for the 262-400-cid small-block Chevrolet V-8 gasoline engines.
This information is provided with the 23-Degree Cylinder Head. It can be presented at a smog inspection station during a smog check.