Supersedes All Previous Catalogs Catalog No ... - TradeMotion.com

NEW! 355 HORSEPOWER RACING ENGINE
Circle track crate engine designed for use in the NASCAR / Dodge Weekly
Racing Series in Modified, Late Model, and Street Stock applications. Dyno
tested and factory sealed to ensure consistent output. This factory-sealed
crate engine includes the water pump, damper, ignition system with
distributor, oval track oil pan, timing chain tensioner, and aluminum
valve covers.
SPECIFICATIONS:
Horsepower: 355 horsepower at 5300 rpm
Torque: 405 ft.-lbs of torque at 3800 rpm
Maximum Recommended rpm: 5800 rpm
Displacement: 363.5 c.i.
Bore: 4.020"
Stroke: 3.58"
Compression Ratio: 10:1
Connecting Rods: Length is 6.123" — forged steel with
high-performance rod bolts
Crankshaft: Cast steel
Cylinder Heads: Aluminum “Late 360" (P4876624)
Combustion Chamber Size: 53 cc
Valve Angle: 18°
Intake Manifold: Aluminum dual plane (P5007381)
Valve Sizes: 1.92" intake / 1.625" exhaust (stainless)
Rocker Arms: 1.52:1 with heavy-duty 3/8" bolts
Camshaft: Hydraulic roller tappet (P4876348)
Lift: .501" intake /.513" exhaust
Duration at .050" 230 intake / 234 exhaust
Valve Spring / Retainers: High-performance (P5249464)
Valve Covers: Die cast aluminum with breather
Block: Late 360 — Reman (thermal cycled)
Pistons: Flat-top hypereutectic with coated skirt and valve relief
Distributor / Ignition: High-performance electronic
Ignition Kit (P3690426)
Oil Pump: Melling high-volume
Oil Pan / Pickup: Race with kick-out (8-quart)
Water Pump: Aluminum with 6-blade — normal rotation
Fuel Pump Eccentric: High-performance moly coated
Fuel: 92 octane gasoline
*P5007949 355 Horsepower Racing Engine †
CAST
IRON “R3”
RACE BLOCKS*
Building on our heritage, the R3
race block family offers the latest in
design technology along with the options to
meet your specific needs. All of these blocks feature:
• Process-controlled castings utilizing high-strength cast iron and a
computer-controlled stress relieving process
• 100% CNC machining with full statistical process control
• Thick deck surface and 6-bolt cylinder head attachment (48° blocks)
for improved sealing and reliability
• Rough bore at 3.980" with various options that provide over-bore
capacities up to 4.220" (in siamesed-bore versions)
• Various options that provide deck height potentials of 8.900" to 9.560"
• Tappet angles in both 59° (stock) and 48° (improved valve train geometry)
• Thicker main webbing and pan rail for improved rigidity
• 2- and 4-bolt mains in ductile iron, billet, and aluminum options
• 318/340 main journal size
• Machining for pre-Magnum head oiling as well as engine mounts
(except P4876789AB)
• 59° blocks are not recommended for use with roller tappets
NOTE: For complete Engine Block listings, see the Race Block Application
Chart on p. 56.
TIMING CHAIN COVER
Front timing chain covers to fit your needs. Package includes cover,
seal, and gasket. For V6 and “A” engines.
P5249930 Production Timing Chain Cover —
9.560" deck height (up to 1991)
P4876377 Sand Cast Race Timing Chain Cover —
9.560" deck height (up to 1991)
P4876631
P4876632
Sand Cast Race Timing
Chain Cover — 9.00"–9.20"
deck height, standard
water pump
Sand Cast Race Timing
Chain Cover — 9.00"–9.20"
deck height, race style water
pump and front engine plate
(pictured)
340 REPLACEMENT ENGINE BLOCK
Limited production of the original 340 block has made it very difficult to
find in good condition. Why take a chance with a 30-plus-year-old block
when you can buy a new one? This new casting includes the original 340
production casting part number with an “M”
added at the end to identify the new
Mopar 340 block. The block
has a few cosmetic
differences from
the original 340
block, but it is
machined to work
with all 340
production components.
Special features include:
• Brand-new castings made
from high nickel cast iron for added strength (not a thin wall casting)
• 4-bolt main bearing caps, 340 journal size
• Thicker webbing and pan rail (like the 340 T/A)
• Thicker deck surface
• Thicker bore wall in major/minor thrust directions
• Rough bore at 3.980" to allow various bore sizes from 4.000" to 4.080"
size (finish bore and honing required)
• Deck height is approximately 9.600"
• Requires the use of oil filter part number 05281090
• Ideal block for restoration or where racing rules require a 340 block
• Not recommended for use with roller tappets
• May require use of late 1970s 318 motor mount (left side)
*P5007552 340 Replacement Engine Block
NOTE: For complete Engine Block listings, see the Race Block
Application Chart on p. 56.
TIMING CHAIN TENSIONER
This timing chain tensioner stabilizes cam
timing by reducing timing chain slack.
Replaces the thrust plate. Designed
for “A” engine as well as 3.9L, 5.2L,
5.9L and “Late 360” engines. Use
instead of thrust plate P5249637.
P5007709
Timing Chain Tensioner
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*Not legal for sale on pollution-controlled vehicles or vehicles registered for highway use.
† Late availability.
*Not legal for sale on pollution-controlled vehicles
or vehicles registered for highway use.
Go to mopar.com for complete product listings.
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