BY THE NUMBERS
461ci Big-Block Olds
Bore: 4.155 inches
Stroke: 4.250 inches
Displacement: 461 ci
Compression ratio: 10.44:1
Camshaft: COMP flat tappet
Cam duration: 240/246 degrees at .050
Valve lift: 541/.544 inch
Rocker ratio: 1.6:1
Lobe separation: 110 degrees
Installed centerline: 109 degrees
Top ring: 1/16 inch
Top ring gap: .026 inch
Second ring: 1/16 inch
Second ring gap: .028 inch
Oil ring: 3/16 inch
Pistons: SRP
Block: stock 455 Olds
Crankshaft: stock nodular iron
Rods: Eagle 6.735 inch steel
Main journal: 2.988 inches
Main bearing clearance: .0035 inches
Rod journal: 2.488 inches
Rod bearing clearance: .0027 inch
Bearings: Clevite
Cylinder heads: Edelbrock Performer RPM
Intake valve diameter: 2.072 inches
Exhaust valve diameter: 1.680 inches
Intake manifold: Edelbrock Torquer
Carburetor: Holley 750 cfm
Ignition: MSD

DYNO DATA
RPM TQ HP
3,000 494 282
3,100 489 289
3,200 487 297
3,300 488 306
3,400 490 317
3,500 494 329
3,600 501 344
3,700 512 361
3,800 522 378
3,900 529 393
4,000 535 407
4,100 540 422
4,200 540 432
4,300 540 442
4,400 540 451
4,500 540 462
4,600 540 473
4,700 538 481
4,800 533 487
4,900 528 493
5,000 522 497
5,100 516 501
5,200 511 505
5,300 505 509
5,400 499 513
5,500 491 514
5,600 481 513
5,700 471 511
Ave: 513 425

SOURCE
Edelbrock (Carbs)
800-416-8628
http://www.edelbrock.com
Eagle Specialty Products (Rotating Assy.)
662-796-7373
http://www.eaglerod.com
MSD IGNITIONS
El Paso
915-857-5200
www.msdignition.com
Professional Products
12705 South Van Ness Avenue
Hawthorne
CA  90250
323-779-2020
www.professional-products.com
Summit Racing Equipment
PO Box 909
Akron
OH  44398
800-230-3030
330-630-0240
www.summitracing.com
School of Automotive Machinists
1911 Antoine
Houston
TX  77055
713-683-3817
http://www.samracing.com
Comp Cams
3406 Democrat Road
Memphis
TN  38118
800-999-0853
http://www.compcams.com
Clevite/Mahle
7670 Hacks Cross Road
Olive Branch
MS  38654
662-893-2860
www.engineparts.com
Holley/Hooker
1801 Russellville Road
Bowling Green
KY  42101
270-782-2900
www.holley.com
Mondello Performance Products
1103 Paso Robles Street
Paso Robles
CA  93446
805-237-8808
www.MondelloTwister.com
Holley Performance Products/Brands
1801 Russellville Rd.
Bowling Green
KY  42101
270-781-9741
www.holley.com
SRP Pistons
15312 Connector Lane
Huntington Beach
CA  92649
714-898-9764
www.SRP.com