For some, racing is no fun when you're constantly wrenching on the motor. Think about it; the whole point of hitting the track is to have fun, hammer the throttle, and slam some gears. The stresses of life dissolve, and you leave your week at the office there-at the office. But when your weekend of racing turns into completely dismantling your mill between runs just to make the next pass, you begin to realize that your night of fun has morphed into an evening of stress and anxiety. With this in mind, we set out to build a powerplant that'll bring back the fun with a serious seat-of-the-pants rush.

A quick call over to Coast High Performance in Torrance, California, landed us a bored and poked 454, netting us a total of 496 cubes. We knew we were going to need the bigger cubes, but we also knew the added inches wouldn't be a surefire guarantee of power. We wanted a slight bump in compression, and matching that to the right induction setup and camshaft would prove to go a long way. To bump up the bang within the cylinders, we went with a set of Probe dome pistons and bolted on a set of CNC-ported Edelbrock Victor Jr. cylinder heads with a Victor Jr. manifold as well.

For the baseline pulls, we used 104-octane fuel, made small adjustments along the way, such as tweaking the Holley carburetor, throwing additional timing at it, and checking the valve lash to make sure they were at 20/22 hot. After break-in, we dumped the Lucas break-in oil, trashed the filter, checked the oil for any metal debris, and added fresh 5W-30 oil with a new filter.

How'd it do? On 104-octane, the 496 pumped out 671 hp at 6,600 rpm and 586 lb-ft at 5,200. Impressive, yes! However, we were curious to see the results on pump gas. Willing to find out, we fired it up for another run at it and churned out an incredibly similar 672 hp at 6,600 and 585 lb-ft at 5,200. You have the numbers, but you have to read on to find out how to build one for yourself.

Quick Notes
What We Built
An 11:1 stroker 496ci big-block

Bottom Line
Check your valve lash, top off the fuel, and enjoy the smell of burning rubber!

Cost (APPROX)
$8,000

BASELINE
PEAK TORQUE 581
AVG. TORQUE 555
PEAK HP 651
AVG. HP 574
FINAL PULL
PEAK TORQUE 585
AVG. TORQUE 562
PEAK HP 672
AVG. HP 581
496 BUILD SPECS
Bore x stroke 4.310x4.250
Displacement 496 ci
Head gasket thickness 0.041
Piston deck height 0.005
Total clearance 0.046
Compression ratio 11:1
Piston-to-wall clearance 0.004
Ring endgaps 0.022, 0.024
Rod bearing clearance 0.0027
Main bearing clearance 0.0027
Crank endplay 0.007
Main bearing cap torque 105 ft-lb (w/moly-lube)
Rod bolt torque 63 ft-lb (w/moly-lube)
Head bolt torque 65/75 ft-lb (w/moly-lube)
* Except as noted, all dimensions are in inches.
PRICE SHEET
Manufacturer Item PN Price
Coast High Performance High-compression short-block $3,700
Includes Gen IV 454 block bored 0.030, Probe 4340 H-beam rods and high-compression pistons, Perfect Circle piston rings, RPM overstroked crank
Comp Cams Retainers 733-16 345
Valvesprings 26099-16 487
Locks 612-16 27
Spring seats 4774-16 43
Lash caps 621-16 43
Intake pushrods 7743-1 13
Exhaust pushrods 7755-1 13
Lifters 819-16 325
1.7 rockers 819-16 295
Edelbrock Cylinder heads (bare) 60419 1250
Intake manifold 2902 230
Valve covers 4180 163
Fel-Pro Cylinder head gasket 1017-1 45
Intake gasket 1211 17
Milodon Oil pan 30950 211
Oil pump 18760 75
Oil pick-up 18201 64
Oil pump shaft 23060 16
Oil pan studs 81305 23
Oil pump baffle 32505 8
Dipstick 22010 55
BBC gasket pan set 40200 22
Head studs 80133 200
BBC timing chain 15055 112
Cam plate 10777 14
Cam button 10776 13
Timing cover 14855 130
Billet block-off 65705 22
Professional Products Balancer 80005 70
TOTAL $8,031
SOURCE
COMP Cams Probe Industries
1650 W. 228th St.
Torrance
CA  90501
310-784-2977
www.probeindustries.com
Edelbrock
Dept. 5.0
2700 California St.
Torrance
CA  90503
310-781-2222
www.edelbrock.com
Professional Products
Hawthorne
CA
3-23/-779-2020
professional-products.com
Milodon
2250 Agate Ct.
Simi Valley
CA  93065
805-577-5950
www.milodon.net
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