Chevrolet - GM 1986-99 350CI 4-BOLT MAIN BARE BLOCK
     This engine block is used in 1986 to 1999 Gen I heavy-duty applications.
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 DESCRIPTION
1986-99 350ci 4-Bolt Main Bare Block
P/N 10105123
      This engine block is used in 1986-99 Gen I heavy-duty applications. It has 4.00” diameter cylinder bores and four-bolt main bearing caps. This block is machined for a one-piece rear crankshaft seal. (Does not include rear seal or adaptor.) These blocks weigh 197 lbs.
Technical Notes: Cylinder wall thickness is the same as current production engines. The lifter valley is machined for hydraulic roller and flat tappets. Crankshafts with two-piece seals can be installed with adapter P/N 10051118. (Block casting P/N 10243880 or 14093638.)

 SPECIFICATIONS:
Block Material:
Cylinder Wall Type:
Cylinder Deck Height:
Cylinder Bore Range:
No. Bearing Cap Bolts:
Cap Bolt Orientation:
Bearing Cap Type:		 Cast Iron
Non-Siamesed
9.025”
4.000”-4.030”
4
Straight
Gray Cast Iron		 Crankshaft Journal Dia.:
Oil Sump Type:
Crankshaft Seal Type:
Design Max. Stroke:
Weight (lbs. - bare):
Intended Max. Hp @ RPM:
Intended Usage:		 2.45”
Wet
1 piece
3.75”
197
350 @ 5700
Street