Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Engines and Components› Engines, Blocks and Components
ATK ENGINES
CHRY FWD 604 4SPD
SKU: A040 2212AA-90
Moderate — 2–4 hours
Overview
• HP: 345 • TQ: 445 • Block: OE roller block 4 bolt main 1pc seal 1996-2000 • Bore/Stroke: 4.040” x 3.750” • Displacement: 383CI • Crankshaft: Scat Nodular Iron external balance rear of crank/internal balance front of the crank • Rods: Scat I Beam 5.7” Rods with ARP 8740 Bolts • Pistons: Hypereutectic 9.5:1 compression • Rings: Moly • Camshaft: Hyd. roller • Cam Specs: 210/215 @50 .462in/.470ex 112LSA • Timing Chain: Double roller • Cylinder Heads: Dart vortec cast iron 67cc/165cc 2.02/1.60 • Rocker Arms: Stamped steel 1.5 ratio • Oil Pan: Rear sump 5qt (not for Chevelles with steering behind crossmember, some corvettes and 62-67 chevy II’s) • Oil Pump: Melling STD volume • Flexplate/Flywheel: Externally balanced (with scat kit) or Flywheel depending on application
Recommended Components:
• Balancer: Internally balanced – Dayco #PB1046-N or per application • Intake Manifold: Marine grade dual plane • Distributor: Marine grade pro billet (iron gear) • Water Pump: Per application • Carburetor: Marine grade Quick Fuel 650CFM mechanical secondary’s electric choke #M-650 • Fuel Injection: Can be used with MPFI, but custom tuning required to ECM. • Fuel Pump: Marine grade 80-110GPH mechanical or an Electric fuel pump • Spark Plugs: Autolite #605 • Spark Plug Wires: Marine grade 8mm per application
Engine Info:
• Oil: Conventional / Non Synthetic 10W30 • Oil Filter: Wix or K&N • Timing: 34-36 Degrees • Spark Plug Gap: .035” • Firing Order: 18436572 • Octane: 91+ • Stall Converter: Stock • Exhaust: 1 5/8 Headers or stock manifolds
Notes: This is a MARINE engine. The bearing clearances and camshaft profile are designed for marine use. Not intended for automotive applications.
Disclaimer: The parts listed are ATK’s recommendations of parts to be used to obtain our power figures listed. Power figures can vary based on parts used by the end user. It is the customer’s responsibility to verify components will work in their application. Some modifications to the vehicle may be required using these and other aftermarket parts. ATK reserves the right to substitute parts used in engines if necessary.
Show original supplier description
Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.
Fitment
Fitment Guaranteed
Don’t gamble
on fit.
Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.
Available on iOS & Android
Specifications
| Brand | ATK ENGINES |
| Part Number | A040 2212AA-90 |
About MOTORMIA
Buy with Confidence
Returns & Fitment
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.
View Full Return PolicyShipping
Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.
Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.
View Full Shipping Policy