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ATK ENGINES
CHEV BW4472 TRANF CASE
SKU: A040 X102
Moderate — 2–4 hours
Description
• HP: 515
• TQ: 585
• Block: Seasoned OE block 1987-1992
• Bore/Stroke: 4.400 x 4.150
• Displacement: 502
• Crankshaft: Scat nodular iron internal balance
• Rods: Scat 4340 forged I beam with ARP 8740 bolts
• Pistons: Hypereutectic 9.5.1 compression
• Rings: Moly
• Camshaft: Hyd. flat tappet
• Cam Specs: 225/235 @50 .536in/.541ex 112LSA
• Timing Chain: Double roller
• Cylinder Heads: Edelbrock performer RPM aluminum 75cc/292cc 2.190/1.760
• Rocker Arms: Stainless steel 1.73 ratio
• Oil Pan: Front sump
• Oil Pump: Melling high volume
• Balancer: Dayco internal balance
• Flexplate/Flywheel: Pioneer internal balance
• Intake Manifold: Edelbrock performer RPM dual plane
• Distributor: Pro billet RTR (Iron Gear)
• Water Pump: OE Cast iron
• Carburetor: Quick Fuel 770CFM vacuum secondary’s electric choke
• Fuel Pump: Mechanical
• Spark Plugs: Autolite #3923
• Spark Plug Wires: 8mm
Engine Info:
• Oil: Conventional / Non Synthetic 10W30 with Comp Cam zinc additive #159 for first 3000 miles
• Oil Filter: Wix or K&N per application
• Timing: 34-36 Degrees
• Spark Plug Gap: .035”
• Firing Order: 15426378
• Octane: 91+
• Stall Converter: 2200-2500
• Exhaust: 1 ¾-2” Headers
Fitment
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Specifications
| Brand | ATK ENGINES |
| Part Number | A040 X102 |
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Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.
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