Chevrolet - SMALL-BLOCK CHEVY V8 ALUMINUM PRO COMPETITION BARE BLOCKS
     These aluminum bare blocks weight around 90 lbs. lighter than a cast iron bare blocks. Both part number 10185075 and 10134400 are listed on this page. Both are designed for Professional Competition applications up to 800 horsepower and 8,000 RPM. P/N 10134400 is designed to go up to 8,600 RPM.
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 P/N 10185075 STANDARD DECK PRO COMPETITION BLOCK DESCRIPTION
Aluminum V8 Cylinder Case
P/N 10185075
      The aluminum V8 bare block weighs 90 lbs. and is cast from prime ingot A-356 aluminum with heat treatment to T6 specifications. Wall thicknesses have been increased for greater stress capabilities. The main bearing diameter is 2.45”. Its rigid deck surfaces are .620”. It has blind-tapped head bolt holes to improve head gasket sealing. The cylinder sleeves are semi-finished at 3.986” and will finish at 4.150” bore diameter. It has a 4-bolt main bearing cap on all five locations of 8620 steel which will clear standard oil pans. The rear main bearing is the 2-piece, pre-1986 design. These blocks are wet sump designed but can be converted to dry sump oiling by simply plugging the oil pump hole in its rear main bearing cap. Use cam bering kit P/N 12370843.

 P/N 10185075 STANDARD DECK PRO COMPETITION BLOCK SPECIFICATIONS
Block Material:
Cylinder Wall Type:
Cylinder Deck Height:
Cylinder Bore Range:
No. Bearing Cap Bolts:
Cap Bolt Orientation:
Bearing Cap Type:		 A-356 Aluminum
Siamesed
9.025”
3.986”-4.135”
4
Splayed 20°
8620 Steel		 Crankshaft Journal Dia.:
Oil Sump Type:
Crankshaft Seal Type:
Design Max. Stroke:
Weight (lbs. - bare):
Intended Max. Hp @ RPM:
Intended Usage:		 2.45”
Wet (can convert to dry)
2 piece
3.75”
90
800 @ 8000
Professional Competition

 P/N 10134400 STANDARD DECK PRO COMPETITION BLOCK DESCRIPTION
Aluminum V8 Block
P/N 10134400
      This block has the same dimensions and characteristics of the Aluminum Cylinder Case (P/N: 10185075-above) except that it has a 2.65” (400ci) diameter main bearing size and the bore is 4.120” Use cam bearing kit P/N 12370843. This block is machined for a dry sump oiling system.

 P/N 10134400 STANDARD DECK PRO COMPETITION BLOCK SPECIFICATIONS
Block Material:
Cylinder Wall Type:
Cylinder Deck Height:
Cylinder Bore Range:
No. Bearing Cap Bolts:
Cap Bolt Orientation:
Bearing Cap Type:		 A-356 Aluminum
Siamesed
9.025”
4.117”-4.135”
4
Splayed 20°
8620 Steel		 Crankshaft Journal Dia.:
Oil Sump Type:
Crankshaft Seal Type:
Design Max. Stroke:
Weight (lbs. - bare):
Intended Max. Hp @ RPM:
Intended Usage:		 2.65”
Dry
2-piece
3.75”
89
800 @ 8600
Professional Competition