420 HP in a 350 Chevy

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Edelbrock Performer RPM Power Package Components for 350 c.i.d. Chevrolet:

(included with heads; stock heads use #5703).....................#5767

(included with heads stock; heads use #9730).....................#9736

Bore....................................................4.000" + .030"

Stroke..................................................3.480" (stock)

Crankshaft...............................................factory steel

Rods.........factory (polished and shotpeened) 5.700" center to center

Pistons................................................TRW #L2417+.030

Rings ........

Speed-Pro #R9343 +.065" Moly top and cast-iron second

5/64" x 5/64" x 3/16"

Head Gaskets Fel-Pro Perma-Torque Blue o-ring...................#1003

Main Bearings..................Michigan 77 #MS 909 HG# (.0025"-.0030")

Rod Bearings........................Michigan 77 #CB 663 (.002"-.0025")

Piston Wall clearance ......................................... .0065"

Ring End Gap clearance..............top ring .018" / second ring .014"

Rod Side clearance....................................... .014"-.016"

Compression ratio...............................................9.5:1

Ignition and timing................. M.S.D. 6A - 36° total at 3000 rpm

Headers..............

1-3/4" street header 32" primary tube 12" long, 3" diameter collector

Intake port volume..............................................170cc

Intake valve size...............................................2.020"

Exhaust valve size..............................................1.600"

Exhaust port volume..............................................60cc

Combustion chamber size..........................................70cc

Material specs..................356 aluminum heat treated to T-6 spec

Refer to Building a Bowtie 420 HP Package for details on the buildup.