#920 vs. #675 Heads "Compression vs. Cylinder Flow"
The Patient
1967 Barracuda 'Formula S'
* Fastback
* 4-Speed
* 3.55 Gears 'Sure-Grip'
All Stock, except
* F-70 x 14" Goodyear Polyglas GT {Vintage Tires}
* Just Suspension 'Bushing Kit'
* Weber Clutch and Pressure Plate {9.5"}
* Fan-Clutch
* 6-Blade Fan
* Fan Shroud
Project
273 Engine bored {+.040}
Factory Cast Pistons {10.5-1 Compression}
Speed Pro Piston Rings
Federal-Mogul Bearings
Melling High-Volume Oil Pump
Speed Pro Timing Chain
Windage Tray
Internals Balanced = {Rods, Pistons, Crankshaft, Harmonic Balancer and Flywheel}
The Cylinder Heads will receive the 'same' ,
* 3-Angle Valve Job {Seat}, plus a 'Top-dress'
* Back-Cut Valves
* Stock '273' Commando Valve Springs
* Spring Height set
* Bronze-Wall Guide Liners
* Teflon Seals
* Milled to NHRA Specifications
* #2658920 = 57.3 CC
* #2843675 = 60.6 CC
Absolutely 'no porting', 'no gasket matching' or additional bowl work........