SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Fair idle, daily usage, low-mid torque range, 8.0 - 9.5 comp. Ratio, 260/260 IN./EX. Advertized Duration, .427/.427 IN./EX. Gross Lift, 1000-4600 RPM Range

SB Chevy 262-400, 55-87 (non-computer engines)
Smooth Idle, Daily Usage, Low-Mid Torque Range, 8.0-9.5:1 comp ratio.
266/266 In./Ex. Advertised Duration
440/.440 In./Ex. Gross Lift1400-5000 rpm Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Fair idle, daily usage, towing, 4x4 trucks, low-mid torque, 8.0 - 9.5:1 comp. Ratio, 266/266 IN./EX. Advertized Duration, .440/.440 IN./EX. Gross Lift, 1600-5400 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Good idle, moderate performance usage, good mid-range hp, 9.5 - 11.0:1 comp ratio, 284/284 IN./EX. Advertized Duration, .480/.480 IN./EX. Gross Lift, 2800-6200 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Rough idle, moderate performance usage, good mid-range. 2500 + converter, 282/282 IN./EX. Advertized Duration, .470/.470 IN./EX. Gross Lift, 2400-6200 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Rough idle, performance usage, good upper rpm torque, 3500 + converter, 302/302 IN./EX. Advertized Duration, .500/.500 IN./EX. Gross Lift, 3400-7000 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Good idle, daily performance usage, mid-range torque & hp, 2000 + converter, 278/278 IN./EX. Advertized Duration, .467/.467 IN./EX. Gross Lift, 2000-5000 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Fair idle, performance usage, low-mid torque, 2500 + converter, 274/274 IN./EX. Advertized Duration, .450/.450 IN./EX. Gross Lift, 1800-4500 RPM Range

SMALL BLOCK CHEVY 262-400, 55-87 (non-computer engines), Rough idle, performance usage, upper rpm torque & hp, 3000 + stall, 286/286 IN./EX. Advertized Duration, .465/.465 IN./EX. Gross Lift, 3200-6200 RPM Range

BIG BLOCK CHEVY 396-454 (non-computer engines), Good idle, daily usage, good mid-range torque & hp, off road, towing, and highway, 272/272 IN./EX. Advertized Duration, .515/.515 IN./EX. Gross Lift, 2000-5000 RPM Range

BIG BLOCK CHEVY 396-454 (non-computer engines), Fair idle, moderate performance usage, good mid-range hp, mild bracket racing 2500 + converter, 284/284 IN./EX. Advertized Duration, .544/.544 IN./EX. Gross Lift, 2800-5800 RPM Range

BIG BLOCK CHEVY 396-454 (non-computer engines), Fair idle, moderate performance usage, good mid-range hp, mild bracket racing 2000 + converter, 282/282 IN./EX. Advertized Duration, .533/.533 IN./EX. Gross Lift, 2500-5500 RPM Range

SMALL BLOCK FORD 289-302 62-UP (non-computer engines), Smooth idle, daily usage, fuel economy, brute low end torque, 260/260 IN./EX. Advertized Duration, .456/.456 IN./EX. Gross Lift, 1200-4200 RPM Range

SMALL BLOCK FORD 289-302 62-UP (non-computer engines), Good idle, daily usage, off road, good low to mid-range torque, towing, and highway, 272/272 IN./EX. Advertized Duration, .484/.484 IN./EX. Gross Lift, 2000-5000 RPM Range