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In addition
leading to valve seat damage and early valve grind
This units require the use of carrier bearing LM102949 / LM102910
so parallax errors reading the timing marks are virtually eliminated
They are designed to ensure belt retention at high rpm
Chevy SBC 350 Vortec 180cc 64cc Straight Cast Iron Bare Cylinder Head In additionAll Speedmaster 23deg. Small Block Chevy heads are available with Straight or Angled sparkplugs. Standard valve sizes are 2. 020 in. Intake, and 1. 600 in. Exhaust, both +. 100 in. length. While the 2. 02" valves are standard issue, all of our 23deg. aluminum heads can accept a 2. 050 in. intake valve with minimal additional work.
