Edelbrock Performer Cylinder Head - Bare - 2.110 / 1.660 in Valve - 204 cc Intake - 87 cc Chamber - Pontiac V8 Boost Gauge and detailed instructions

and detailed instructions

or AFCO 20031

A spring is a spring right

And when you just need a traditional Memory Tach it does that too

Edelbrock Performer Cylinder Head - Bare - 2.110 / 1.660 in Valve - 204 cc Intake - 87 cc Chamber - Pontiac V8 Boost Gauge and detailed instructionsCylinder Head Specifications: Combustion chamber volume: (A) 65cc 72cc 87cc; Intake runner volume: 204cc; Exhaust runner volume: 145cc; Intake valve diameter: 2. 11"; Valve stem diameter: 11 32"; Exhaust valve diameter: 1. 66"; Valve guides: Manganese bronze; Deck thickness: 5 8"; Valve spring diameter: 1. 46"; 120lbs. @ 1. 800" Inst. Height; Valve spring maximum lift: . 550"; 1. 150" Coil Bind; Rocker stud: 7 16"; Guideplate: Hardened steel; Pushrod