What is Head-Quarters USA?
Head-Quarters began in 1969 with Doug Coffey and a vision. Since then, the demand for Doug's special blend of high performance and dependibility has been overwhelming. Head-Quarters USA was established in order to better serve the needs of retail customers in the US. Nothing else has changed...same great products by the same great company. Welcome to Head-Quarters USA.Technical Information
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DIAGRAMSENGINE SPECIFICATIONS
FLOW CHARTS
MATH FORMULAS
INSTRUCTION SHEETS
- EFI Tuning and Timing Tables
- Pushrod Adjustment
- Air Ramp
- Easy Start Washers
- Swap EFI to Carb
- Piston Ring End Gap