| HEADS |
| Casting Number: |
6X cast-iron or Edelbrock aluminum |
| Chamber: |
Open 95cc cast-iron / 85-87cc Edelbrock |
| Head Mods: |
Port, 3-angle competition valve job, surfaced, |
| dual valvesprings matched to camshaft |
| Combustion Chamber Volume: |
95cc cast iron / 85-87cc |
| Edelbrock |
| Maximum Flow at 28 Inches of Pressure |
| Intake: |
240 cfm at 0.600-in lift for cast-iron heads / |
| 300 cfm at 0.600-in and 315 cfm at 0.700-in lift for |
| Edelbrock aluminum |
| Exhaust: |
215 cfm at 0.600-in lift for cast-iron / 240 for Edelbrock |
| Compression Ratio: |
9.5:1 cast-iron / 10.5:1 Edelbrock |
| Valves: |
Ferrea stainless 2.11/1.77-in |
| Angles Used in Valve Job: |
30/45-deg cast-iron heads, |
| 45/45-deg Edelbrock aluminum heads |
| Mods: |
Back-cut |
| Retainers: |
10-deg chromoly |
| Keepers: |
10-deg chromoly |
| Valveguides: |
Bronze |
| Valve Seals: |
Viton |
| Rocker Studs: |
ARP 7/16-in |
| Rocker Arms: |
Scorpion roller, 1.5:1 or 1.65:1 |
| Pushrods: |
Butler Performance |
| Diameter: |
5/16-in |
| Length: |
Determined at build date |