Donovan Chevy Style Small Block

Donovan Engineering’s Small Block Chevy style aluminum engine blocks are available in three basic Priority Oiling configurations.

HC 400s, the 410s, and the 350/400

Each block is custom-made to suit each engine builder’s requirements, and comes with:

  • Head Stud Kits — studs, nuts, and washers
  • Block Kit — core plugs, dowel pins, etc.
  • Ductile Iron Sleeves
  • Main Caps with studs, nuts and washers

Lightweight options can include removal of engine mounts, oil filter and/or fuel pump bosses.  Lifter valley and exterior shaving/profiling are options, as well.

Raised Cam “HC” blocks raise the cam 0.390″ to allow for stroker cranks which can be sized for either 350 or 400.  Special cam bore sizes are available upon request.

Deck Heights range from 9.025″ – 9.500″, while cylinder bore sizes can also be specified as either 4.00″ or 4.125″, all undersized for finish honing.

Be sure to visit each block’s page for more details:

  • HC 410 & 410 – Racing Blocks without fuel pump boss/oil filter boss/side motor mounts are dry sump only.
  • HC 400 – can add +0.500″ tall deck
  • 350/400 Small Block

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