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The Original 392 Aluminum Hemi Replacement Block Remains a
Drag Racing Cornerstone!
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Donovan Engineering Standard 417 Hemi
- A356-T6 Aluminum
- Ductile Iron Sleeves
- 9/16" Head Studs
- Super-Finish Lifter Bores
- Sleeves Available Straight or Siamese - 4" bore
- Accepts Most 392 Parts
- Gear Drive Available for Blown Engines
- Solid Construction for Rigidity
- 20 -1/2" Main Studs
- 18 - 3/8" Girdle Rail Studs
- 4340 Aircraft Quality Steel Studs, Nuts, and Washers
- Hardened and Ground Locating Dowels (Girdle)
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- Custom Built One-Piece Stainless Steel Valves
- Intake and Exhaust - All Sizes
- The Ultimate in One-Piece Valve Engineering
- Proven in Drag Racing Year After Year
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- Original Circa 1962 Valve Covers (New Re-Issue)
- 356 T-6 Aluminum
- Relief Notches for Larger Springs, Rockers & Stands
- Wide Bottom Flange for Sealing
- Spark Plug Tubes Available
- Three Breather Styles Available
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