Recommended for street and strip, for big blocks only. Must have converter and gears to be streatable. Idles at 1200 RPM. Requires Notched Pistons. Stock rockers ok, TA springs recommended. Rough idle. 10:1 or more CR.
Idle Quality:
Smooth Idle - just like stock
Good Idle - mild lump, but doesn’t impair driveability
Moderate Idle - nice performance sound
Fair Idle - heavy lump
Rough Idle - very lumpy race type idle
VALVE LIFT
- STOCK 1.55 RATIO:
IN: .458”
EXH: .458” - TA ROLLERS 1.60 RATIO:
IN: .473”
EXH: .473”
DURATION
- AT .050
IN: 244
EXH: 264 - ADVERTISED
IN: 292
EXH: 318
- LOBE CENTER: 107
- POWER RANGE: 3300-6000